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米，具体以现行民航规章为准。","tier":"进阶"},{"id":5,"type":"single","stem":"飞行中出现遥控器信号丢失，正确的处置方式是？","options":["立即关闭遥控器","触发返航或悬停等待信号恢复","加速飞远","直接俯冲降落"],"answer":[1],"explanation":"失控时应依靠预先设置的失控保护（返航或悬停）处置，切忌盲目操作；关闭遥控器会加剧失控风险。","tier":"挑战"},{"id":6,"type":"single","stem":"发现无人机电池出现鼓包，应当如何处理？","options":["继续使用","立即停用并妥善回收处理","放入冰箱冷冻","反复充放电激活"],"answer":[1],"explanation":"鼓包意味着电池内部已发生不可逆的化学变化，存在起火爆炸风险，必须立即停用并交由合规渠道回收。","tier":"挑战"},{"id":7,"type":"single","stem":"我国民用无人机实名登记要求适用于？","options":["仅大型无人机","仅企业用户","重量 250 克以上（含）的民用无人机","所有玩具类飞行器"],"answer":[2],"explanation":"按现行规定，重量在 250 克以上（含 250 克）的民用无人机须进行实名登记，并在机身粘贴登记标志。","tier":"基础"},{"id":8,"type":"single","stem":"在机场净空保护区内飞行，应当？","options":["无需任何报备","经批准并遵守空域管理规定","只要高度低于 50 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生成、仅供复习参考。知识点：真高概念。A项错误：海平面参考是海拔高度。B项错误：标准气压面参考属气压高度概念。C项错误：起飞点相对高度不一定等于真高。D项正确：真高以正下方地表为参考。","tier":"基础"},{"id":32,"type":"single","difficulty":"基础","stem":"按《无人驾驶航空器飞行管理暂行条例》，哪组真高空域应按规定划设为管制空域？","options":["真高二百四十米以上空域","真高一百五十米以上空域","真高一百二十米以上空域","真高三百六十米以上空域"],"answer":[2],"explanation":"AI 生成、仅供复习参考。知识点：管制高度界限。A项错误：240米不是规定界限。B项错误：150米会遗漏120米以上部分。C项正确：条例规定真高120米以上应划设。D项错误：360米不是规定界限。","tier":"基础"},{"id":33,"type":"single","difficulty":"基础","stem":"按我国无人机管理规定，微型、轻型、小型无人驾驶航空器的适飞空域应如何识别？","options":["真高低于限值的全部空域","普通公路两侧上方的空域","管制空域范围以外的空域","未在厂商地图标红的空域"],"answer":[2],"explanation":"AI 生成、仅供复习参考。知识点：适飞空域定义。A项错误：低空仍可能属于管制空域。B项错误：道路附近可能涉及管制范围不能一概判断。C项正确：适飞空域为管制空域外空域需核查公布范围。D项错误：厂商标色不能替代官方划设。","tier":"基础"},{"id":34,"type":"single","difficulty":"基础","stem":"核查我国已划设的无人机管制空域具体范围时，主要应依据哪项资料？","options":["机型说明书中的最大升限数据","以往获批任务单上的历史范围","相邻地区政府公布的空域范围","有关设区市政府公布的空域范围"],"answer":[3],"explanation":"AI 生成、仅供复习参考。知识点：空域发布渠道。A项错误：技术升限不是法定管制范围。B项错误：历史许可不能保证当前边界未变。C项错误：相邻地区不能代替作业所在地范围。D项正确：应查询当地依法公布范围并核查临时变化。","tier":"基础"},{"id":35,"type":"single","difficulty":"基础","stem":"已取得无人机驾驶员执照，进入需要批准的空域前还应确认哪项？","options":["载荷供应单位的出货许可","执照训练机构的场地许可","本次飞行活动所需的批准","相同机型上次任务的批准"],"answer":[2],"explanation":"AI 生成、仅供复习参考。知识点：飞行许可层次。A项错误：出货许可不是空域授权。B项错误：训练场许可不覆盖本次区域。C项正确：人员资质不能替代具体飞行活动批准。D项错误：上次批准不自动覆盖本次任务。","tier":"基础"},{"id":36,"type":"single","difficulty":"基础","stem":"已完成任务规划后收到覆盖作业区的有效临时空域管制信息，起飞计划应怎样调整？","options":["降低拍摄分辨率后执行","按原许可覆盖临时管制","按管制要求暂停或重规划","改用手动模式绕开限制"],"answer":[2],"explanation":"AI 生成、仅供复习参考。知识点：临时管制。A项错误：分辨率不能改变空域条件。B项错误：旧安排不能自动覆盖新管制。C项正确：需遵守当前生效管制并重新确认可行性。D项错误：手动模式不消除法律限制。","tier":"基础"},{"id":37,"type":"single","difficulty":"基础","stem":"飞行准备中查阅涉及任务区域的航行通告，主要用于获知哪项？","options":["电池容量与充电循环信息","机身外壳与涂装保养信息","镜头焦距与对焦标定信息","临时障碍与运行限制信息"],"answer":[3],"explanation":"AI 生成、仅供复习参考。知识点：航行通告。A项错误：电池参数不属通告主要内容。B项错误：保养需查设备资料。C项错误：镜头参数属于设备说明。D项正确：通告提供影响航空运行的及时信息。","tier":"基础"},{"id":38,"type":"single","difficulty":"基础","stem":"无人机与有人驾驶航空器出现接近冲突时，基本避让原则是哪项？","options":["按谁先进入航线谁优先","按无人机体积较小优先","按拍摄任务已开始优先","无人机应主动避让有人机"],"answer":[3],"explanation":"AI 生成、仅供复习参考。知识点：有人航空器避让。A项错误：先进入不自动取得优先权。B项错误：体积小不构成优先。C项错误：任务开始不构成优先。D项正确：无人机应避让并保持安全间隔。","tier":"基础"},{"id":39,"type":"single","difficulty":"基础","stem":"安排观察员协助飞行时，操控员应明确哪项协作内容？","options":["观察员以录像代替实时观察程序","观察员获知冲突后单独改航程序","观察范围及冲突告警通信程序","观察员只在失联后开始监视程序"],"answer":[2],"explanation":"AI 生成、仅供复习参考。知识点：运行责任分工。A项错误：录像回放不能代替实时观察。B项错误：未经协调擅自改航可能形成控制冲突。C项正确：需明确实时观察与操控协同告警。D项错误：正常飞行也需按分工监视。","tier":"基础"},{"id":40,"type":"multi","difficulty":"基础","stem":"无人机在经许可的场地作业时，哪些措施有助控制地面第三方风险？","options":["安排人员阻止非作业者进入区域","以侧风下风侧作为人员聚集点","设置作业警戒边界和现场标识","以起降点紧邻路口方便行人通行"],"answer":[0,2],"explanation":"AI 生成、仅供复习参考。知识点：地面风险隔离。A项正确：人员管理帮助保持隔离区。B项错误：下风侧仍可能受失控航空器影响不能单凭风向选人群点。C项正确：边界标识帮助隔离与告知。D项错误：紧邻行人路口增加暴露风险。","tier":"基础"},{"id":41,"type":"single","difficulty":"基础","stem":"气象报告中的北风表示哪种气流方向？","options":["气流从南方吹向北方","气流从西方吹向东方","气流从东方吹向西方","气流从北方吹向南方"],"answer":[3],"explanation":"AI 生成、仅供复习参考。知识点：风向定义。A项错误：南到北是南风。B项错误：西到东是西风。C项错误：东到西是东风。D项正确：风向按来向命名。","tier":"基础"},{"id":42,"type":"single","difficulty":"基础","stem":"风速约每秒十米换算成每小时千米应为多少？","options":["约十八千米每小时","约三十六千米每小时","约二十八千米每小时","约四十八千米每小时"],"answer":[1],"explanation":"AI 生成、仅供复习参考。知识点：风速单位。A项错误：18对应5米每秒。B项正确：米每秒乘3.6得千米每小时。C项错误：28不是该换算结果。D项错误：48对应约13.3米每秒。","tier":"基础"},{"id":43,"type":"single","difficulty":"基础","stem":"露点温度表示空气在水汽含量不变条件下达到哪种状态的温度？","options":["降温后水汽达到饱和","升温后风速达到最大","升温后水汽完全消失","降温后气压保持恒定"],"answer":[0],"explanation":"AI 生成、仅供复习参考。知识点：露点概念。A项正确：露点指降温达到饱和的温度。B项错误：风速最大与露点定义无关。C项错误：加热不会以该定义使水汽消失。D项错误：气压恒定不是露点判据。","tier":"基础"},{"id":44,"type":"single","difficulty":"基础","stem":"在水汽含量基本不变且气压近似不变时，空气温度下降通常使相对湿度怎样变化？","options":["相对湿度始终不变","相对湿度逐渐增大","相对湿度只随风速变","相对湿度逐渐减小"],"answer":[1],"explanation":"AI 生成、仅供复习参考。知识点：相对湿度。A项错误：温度变化会改变相对湿度。B项正确：降温降低饱和水汽压使相对湿度上升。C项错误：风速不是唯一控制因素。D项错误：减小通常对应升温情形。","tier":"基础"},{"id":45,"type":"single","difficulty":"基础","stem":"哪组条件更利于地面夜间冷却形成辐射雾？","options":["晴空强风且近地空气干燥","阴天强风且近地空气干燥","晴空微风且近地空气湿润","阴天微风且近地空气很干"],"answer":[2],"explanation":"AI 生成、仅供复习参考。知识点：辐射雾条件。A项错误：干燥强风不利形成典型辐射雾。B项错误：云层风和干空气不利该过程。C项正确：晴空利于辐射冷却微风湿空气利于成雾。D项错误：很干空气难达饱和且云减弱冷却。","tier":"基础"},{"id":46,"type":"single","difficulty":"基础","stem":"暖湿空气流经较冷地表后形成的雾，主要属于哪种类型？","options":["地面夜间辐射形成的辐射雾","雨滴蒸发增湿形成的降水雾","暖湿平流冷却形成的平流雾","山坡强迫抬升形成的上坡雾"],"answer":[2],"explanation":"AI 生成、仅供复习参考。知识点：平流雾条件。A项错误：辐射雾以夜间地表辐射冷却为主。B项错误：降水雾以降水蒸发为主。C项正确：暖湿空气移过冷表面是平流雾机制。D项错误：上坡雾以沿坡抬升冷却为主。","tier":"基础"},{"id":47,"type":"single","difficulty":"基础","stem":"识别雷暴风险时，应特别关注哪种云系？","options":["均匀薄层的卷层云","平坦分层的高层云","细丝纤维状的卷云","强烈发展的积雨云"],"answer":[3],"explanation":"AI 生成、仅供复习参考。知识点：积雨云风险。A项错误：卷层云不代表强烈雷暴对流核心。B项错误：高层云主要为层状云不能与积雨云风险等同。C项错误：卷云不具备积雨云典型结构。D项正确：积雨云与雷暴强对流关系密切。","tier":"基础"},{"id":48,"type":"single","difficulty":"基础","stem":"飞行气象中的风切变是指哪种变化？","options":["日照或云量随昼夜规律变化","风速或风向随空间明显变化","气温或露点随时间缓慢变化","气压或湿度随季节周期变化"],"answer":[1],"explanation":"AI 生成、仅供复习参考。知识点：风切变定义。A项错误：日照云量不直接定义风切变。B项正确：风切变描述空间上的风矢量变化。C项错误：温露变化不是风切变定义。D项错误：季节气压湿度不是风切变。","tier":"基础"},{"id":49,"type":"single","difficulty":"基础","stem":"强风越过山脊后，背风侧近地空域需重点警惕哪项？","options":["恒定顺风与平稳温度","静止空气与稳定地速","下沉气流与机械乱流","均匀层流与持续上升"],"answer":[2],"explanation":"AI 生成、仅供复习参考。知识点：山地背风侧。A项错误：越山流场并非恒定平稳。B项错误：强越山风不意味着背风侧静风。C项正确：地形可造成背风下沉和涡旋乱流。D项错误：背风侧不能假定均匀持续上升。","tier":"基础"},{"id":50,"type":"multi","difficulty":"基础","stem":"评估一小时后的局地飞行天气时，哪些资料应综合参考？","options":["用月平均风速替代现场阵风值","用远方晴空照片替代本地预报","最新观测及短时天气预报","作业现场风况与云况变化"],"answer":[2,3],"explanation":"AI 生成、仅供复习参考。知识点：气象资料。A项错误：平均不能覆盖短时阵风超限。B项错误：远方晴空不能证明本地区未来无风险。C项正确：最新资料反映当前和短时趋势。D项正确：现场变化补充局地信息。","tier":"基础"},{"id":51,"type":"single","difficulty":"基础","stem":"晴朗白天陆地升温快于海面时，近地层典型海风主要从哪里吹向哪里？","options":["从高空直接垂直吹下","从陆地吹向较冷海面","从海岸沿线固定向北","从海面吹向较暖陆地"],"answer":[3],"explanation":"AI 生成、仅供复习参考。知识点：海陆风。A项错误：海风是近地水平环流组成。B项错误：陆到海多见夜间陆风条件。C项错误：方向依海岸而非固定北向。D项正确：白天热力差异常形成海到陆气流。","tier":"基础"},{"id":52,"type":"single","difficulty":"基础","stem":"近地某层随高度增加气温反而升高，该层称为什么？","options":["气温随高度降低的递减层","水汽全部凝结的饱和层","风速随高度不变的均风层","气温随高度增加的逆温层"],"answer":[3],"explanation":"AI 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生成、仅供复习参考。知识点：侧滑概念。A项正确：侧滑涉及来流偏离机体纵向对称面。B项错误：舵面偏转不是侧滑定义。C项错误：航点高度差不是侧滑定义。D项错误：电压差不是空气动力学侧滑。","tier":"基础"},{"id":56,"type":"single","difficulty":"基础","stem":"有横风时，机头指向与实际地面移动方向不同，应分别称为什么？","options":["机头为迎角移动为侧滑角度","机头为航向移动为航迹方向","机头为空速移动为指示空速","机头为航迹移动为航向方向"],"answer":[1],"explanation":"AI 生成、仅供复习参考。知识点：航向与航迹。A项错误：迎角和侧滑是来流相对机体角度。B项正确：航向是机头指向航迹是地面运动方向。C项错误：空速为速度量不能作这两个方向名称。D项错误：该项将定义颠倒。","tier":"基础"},{"id":57,"type":"single","difficulty":"基础","stem":"为抵消横风漂移而使机头偏向来风侧，该偏角通常称什么？","options":["航迹相对海平面的坡度角","机翼相对气流的临界迎角","航向相对航迹的风修正角","横轴相对水平面的俯仰角"],"answer":[2],"explanation":"AI 生成、仅供复习参考。知识点：迎风修正角。A项错误：坡度角不代表机头水平修正。B项错误：临界迎角关系失速而非水平偏流。C项正确：风修正角用于维持目标地面航迹。D项错误：俯仰是纵向姿态。","tier":"基础"},{"id":58,"type":"single","difficulty":"基础","stem":"规划航点时，纬度和经度通常分别描述哪种位置？","options":["南北位置与东西位置","磁北方向与真北方向","东西位置与南北位置","垂直位置与水平距离"],"answer":[0],"explanation":"AI 生成、仅供复习参考。知识点：航点坐标。A项正确：纬度定位南北经度定位东西。B项错误：经纬度是位置非北向基准。C项错误：该项颠倒含义。D项错误：经纬度不直接描述高度及距离。","tier":"基础"},{"id":59,"type":"single","difficulty":"基础","stem":"在水平地图中相邻航点相距三百米，均匀地速每秒五米且忽略转弯时间，航段用时约多少？","options":["约四十五秒时间","约一百二十秒钟","约九十秒钟时间","约六十秒钟时间"],"answer":[3],"explanation":"AI 生成、仅供复习参考。知识点：航迹距离。A项错误：45秒对应不同速度或距离。B项错误：120秒对应2.5米每秒。C项错误：90秒不符合给定比值。D项正确：300除以5等于60秒。","tier":"基础"},{"id":60,"type":"multi","difficulty":"基础","stem":"记录一次人工中止任务事件时，哪些内容有助后续排查？","options":["按记忆覆盖原始记录的时间戳","中止时刻及航空器当时状态","用本月平均电量替代当次数据","告警内容及操控处置的过程"],"answer":[1,3],"explanation":"AI 生成、仅供复习参考。知识点：飞行记录。A项错误：覆盖时间戳破坏可追溯性。B项正确：时刻状态有助定位日志。C项错误：平均值不能替代事件时数据。D项正确：告警处置有助分析过程。","tier":"基础"},{"id":61,"type":"single","difficulty":"进阶","stem":"无人机在海拔二百米的平地起飞，飞至海拔三百米的山坡上方且海拔高度为三百五十米，此时真高为多少？","options":["约五十米的真高","约三百五十米真高","约一百米的真高","约一百五十米真高"],"answer":[0],"explanation":"AI 生成、仅供复习参考。知识点：高度基准转换。A项正确：350减去正下方300得50米。B项错误：350为海拔高度非真高。C项错误：100为两处地面海拔差。D项错误：150为距起飞地相对高度。","tier":"挑战"},{"id":62,"type":"single","difficulty":"进阶","stem":"任务航线贴近管制空域边界但定位有数米误差，规划宜怎样处理？","options":["把边界当作准确贴线飞行轨迹","按地图像素误差向管制侧外推","靠禁飞告警弹窗代替边界规划","在合法范围内预留安全裕度"],"answer":[3],"explanation":"AI 生成、仅供复习参考。知识点：边界与测量误差。A项错误：贴线容易因误差越界。B项错误：误差不授权扩大合法范围。C项错误：厂商告警不能代替空域规划。D项正确：裕度考虑定位和执行误差需依法核查边界。","tier":"挑战"},{"id":63,"type":"single","difficulty":"进阶","stem":"小型无人机在适飞空域执行依法无需申请的普通飞行，起飞前还应如何理解要求？","options":["仍核查临时限制和其他合规条件","驾驶员执照可抵消所有临时管制","无需申请即等同不受任何规则约束","适飞空域内可忽略运行安全要求"],"answer":[0],"explanation":"AI 生成、仅供复习参考。知识点：非管制与附加条件。A项正确：免申请不免除其他运行规定。B项错误：执照不能覆盖临时管制。C项错误：免申请不代表免管理。D项错误：安全义务仍然适用。","tier":"挑战"},{"id":64,"type":"single","difficulty":"进阶","stem":"飞行活动获准限定在某区域和时段，客户临时要求到范围外拍摄，操控员应怎样处理？","options":["记录客户要求就能替代审批","原任务已批准即可直接延伸","按规定重新确认变更许可","只延长拍摄不算改变飞行范围"],"answer":[2],"explanation":"AI 生成、仅供复习参考。知识点：任务改变与批准。A项错误：客户要求不是批准依据。B项错误：批准有明确范围不自动延伸。C项正确：需按变更程序确认新的许可条件。D项错误：拍摄范围外需要航空器飞行仍属改变。","tier":"挑战"},{"id":65,"type":"single","difficulty":"进阶","stem":"操控员专注任务屏幕而观察员发现近旁直升机，最有效的协同信息是哪项？","options":["及时报告方位距离及接近趋势","等录像拍清识别编号后再报告","只报告发现目标的机型类别","仅将发现目标记入落地交接表"],"answer":[0],"explanation":"AI 生成、仅供复习参考。知识点：观察员告警。A项正确：位置和趋势支持即时冲突判断与避让。B项错误：等待识别编号会延误告警。C项错误：机型类别不足以确定冲突态势。D项错误：事后记录不能支持当前避让。","tier":"挑战"},{"id":66,"type":"single","difficulty":"进阶","stem":"多旋翼去程顺风、回程逆风且回程预计地速较低，留电计划宜怎样安排？","options":["按出发时满电忽略回程风况","按去程顺风地速估算回程耗电","按去程用时简单翻倍定总航时","按回程时间及负载预留余量"],"answer":[3],"explanation":"AI 生成、仅供复习参考。知识点：顺逆风往返能耗。A项错误：满电不等于足够返程余量。B项错误：顺风数据不能直接代表逆风回程。C项错误：对称时间假设忽略风效应。D项正确：需考虑逆风回程时间与功率并留安全量。","tier":"挑战"},{"id":67,"type":"single","difficulty":"进阶","stem":"航空器保持正北地面航迹，空速十米每秒且有向东六米每秒的横风，理想稳态北向地速约为多少？","options":["约每秒八米的地速","约每秒六米的地速","约每秒十米的地速","约每秒十六米地速"],"answer":[0],"explanation":"AI 生成、仅供复习参考。知识点：横风速度合成。A项正确：西向空速分量6抵风北向分量平方根100减36得8。B项错误：6是横风分量。C项错误：10未考虑空速分量分配。D项错误：16错误把横风直接相加。","tier":"挑战"},{"id":68,"type":"single","difficulty":"进阶","stem":"环境温度低于零度且近地水汽接近饱和，机翼表面出现霜层，起飞前应怎样处理？","options":["按手册除霜并确认表面状态","以地面滑跑气流吹走全部霜层","只延长滑跑距离替代机翼除霜","只增加油门补偿表面粗糙影响"],"answer":[0],"explanation":"AI 生成、仅供复习参考。知识点：低温结霜识别。A项正确：霜改变气动特性需按手册恢复允许的表面状态。B项错误：不能保证滑跑气流去除附着霜。C项错误：加长跑距不能消除霜的气动影响。D项错误：加油门不能恢复翼型状态。","tier":"挑战"},{"id":69,"type":"single","difficulty":"进阶","stem":"航空器从低温室外带入温暖潮湿室内后，内部可能出现凝露，通电检查应怎样安排？","options":["只擦干机壳外表就立即解锁电机","立即大负荷运行用电机热量烘干","按手册待干燥和温度稳定后进行","用高温热风对准传感器持续吹扫"],"answer":[2],"explanation":"AI 生成、仅供复习参考。知识点：雨后凝露。A项错误：外干不代表内部干。B项错误：负载运行可能造成电气风险。C项正确：凝露可能影响电气绝缘需符合手册的干燥稳定流程。D项错误：高温直吹可能损伤部件。","tier":"挑战"},{"id":70,"type":"multi","difficulty":"进阶","stem":"任务区域雷暴临近但尚未下雨，哪些信息仍足以提示提前结束飞行？","options":["仅因没有雨就判定可继续飞行","观测到明显阵风锋接近区域","出现雷声并见强对流云发展","仅因画面清晰就判定可继续飞行"],"answer":[1,2],"explanation":"AI 生成、仅供复习参考。知识点：雷暴撤离判断。A项错误：无雨不能排除雷暴风电风险。B项正确：阵风锋可先于降水到达。C项正确：雷暴危险不以正在降雨为必要条件。D项错误：画面清晰不能排除强对流。","tier":"挑战"},{"id":71,"type":"single","difficulty":"进阶","stem":"固定翼在协调水平转弯中保持高度，坡度角增大通常对所需升力有什么影响？","options":["所需总升力随之增大","所需总升力随之减小","所需总升力始终等重力","所需总升力只由航向决定"],"answer":[0],"explanation":"AI 生成、仅供复习参考。知识点：固定翼转弯载荷。A项正确：升力垂直分量需平衡重量总升力随坡度增加。B项错误：减小会使垂直分量不足。C项错误：等重力只适用于无坡度相应状态。D项错误：航向本身不决定该受力关系。","tier":"挑战"},{"id":72,"type":"single","difficulty":"进阶","stem":"理想协调水平转弯坡度角为六十度时，载荷因数约为多少？","options":["约二点零倍载荷","约一点二倍载荷","约三点零倍载荷","约一点五倍载荷"],"answer":[0],"explanation":"AI 生成、仅供复习参考。知识点：固定翼转弯计算。A项正确：载荷因数1除以cos60等于2。B项错误：1.2不是该坡度结果。C项错误：3对应更大坡度。D项错误：1.5不是该坡度结果。","tier":"挑战"},{"id":73,"type":"single","difficulty":"进阶","stem":"固定翼载荷使重心前移但仍在许可范围内，起飞前配平检查通常需重点关注哪项？","options":["俯仰配平需求和升降舵控制余量","偏航配平需求和方向舵控制余量","相机偏转角度和云台偏航余量","通信发射功率和遥控链路余量"],"answer":[0],"explanation":"AI 生成、仅供复习参考。知识点：固定翼重心前移。A项正确：重心前移改变纵向力矩需检查俯仰能力。B项错误：方向舵不是解决纵向配平的主要控制。C项错误：云台角度不能代替航空器配平。D项错误：通信余量重要但不是重心前移配平的核心。","tier":"挑战"},{"id":74,"type":"single","difficulty":"进阶","stem":"无风条件下固定翼保持相同坡度角，增大真空速会怎样影响转弯半径？","options":["转弯半径随空速线性减小","转弯半径随空速平方增大","转弯半径只随飞行时间增大","转弯半径保持与原值相同"],"answer":[1],"explanation":"AI 生成、仅供复习参考。知识点：固定翼转弯半径。A项错误：方向和变化规律均错误。B项正确：固定坡度理想半径空速的平方除以重力加速度与坡度角正切的乘积。C项错误：时间不是半径的决定变量。D项错误：速度增加会改变半径。","tier":"挑战"},{"id":75,"type":"single","difficulty":"进阶","stem":"任务地图采用真北而航向传感显示磁北基准，比较两者前需要关注哪项？","options":["任务相对高度及海拔基准转换","地图投影比例及图上距离转换","当地磁偏角及磁真基准转换","航迹地速大小及空地速度转换"],"answer":[2],"explanation":"AI 生成、仅供复习参考。知识点：磁真航向。A项错误：高度转换不解决水平北向基准。B项错误：距离转换不解决方向基准。C项正确：磁偏角关联磁北与真北。D项错误：空地速度不能直接代替磁真方向转换。","tier":"挑战"},{"id":76,"type":"single","difficulty":"进阶","stem":"客户给出航点而导入后与实地整体偏移，首先应核对哪项？","options":["高程基准与相对高度输入值","坐标基准与经纬度输入格式","时间基准与照片拍摄时间值","空速单位与航线速度输入值"],"answer":[1],"explanation":"AI 生成、仅供复习参考。知识点：坐标基准兼容。A项错误：高程基准主要造成垂直差而非水平整体偏移。B项正确：水平整体偏移应先查坐标基准及格式。C项错误：时间基准不直接改变静态航点位置。D项错误：速度单位不改变航点本身坐标。","tier":"挑战"},{"id":77,"type":"single","difficulty":"进阶","stem":"相机焦距和像元尺寸固定，航测相对地面飞行高度加倍时，地面采样距离通常怎样变化？","options":["地面采样距离约减为一半","地面采样距离保持原来大小","地面采样距离约增为两倍","地面采样距离约增为四倍"],"answer":[2],"explanation":"AI 生成、仅供复习参考。知识点：影像分辨率。A项错误：高度升高并非改善到一半。B项错误：高度改变使GSD改变。C项正确：针孔模型GSD与相对高度成正比。D项错误：面积会有平方关系但GSD是线性尺寸。","tier":"挑战"},{"id":78,"type":"single","difficulty":"进阶","stem":"航测区地形起伏大，保持恒定海拔高度可能使图像地面分辨率不一致，主要原因是哪项？","options":["图像文件编号必然随海拔变化","航空器与地面的相对高度变化","像元物理尺寸必然随气压变化","相机镜头焦距必然随地形变化"],"answer":[1],"explanation":"AI 生成、仅供复习参考。知识点：地形跟随。A项错误：文件编号不是分辨率原因。B项正确：相对高度影响地面采样距离。C项错误：像元尺寸不随此气压变化。D项错误：固定镜头不会因地形必然变焦。","tier":"挑战"},{"id":79,"type":"single","difficulty":"进阶","stem":"航测曝光期间地面相对速度较大且出现拖影，优先可调整哪项以减小拖影？","options":["延长曝光时间并保持原有地速","提高飞行地速并保持原有曝光","缩短曝光时间并核查成像效果","增加航线间距并保持原有曝光"],"answer":[2],"explanation":"AI 生成、仅供复习参考。知识点：航测运动模糊。A项错误：延长增加位移。B项错误：提速增加位移。C项正确：缩短曝光可减小曝光期间位移。D项错误：航线间距不减少单张照片曝光位移。","tier":"挑战"},{"id":80,"type":"multi","difficulty":"进阶","stem":"开展需要精度检核的航测项目时，哪些控制资料管理做法较适宜？","options":["用参与拟合的点替代独立检查点","保留独立检查点用于成果评估","只比较模型内距就确认绝对精度","核对控制点坐标系与高程基准"],"answer":[1,3],"explanation":"AI 生成、仅供复习参考。知识点：测绘控制资料。A项错误：拟合点残差不能完全代表独立精度。B项正确：独立点帮助客观检核。C项错误：内部距离不能单独确认绝对位置精度。D项正确：基准一致保证正确利用控制数据。","tier":"挑战"},{"id":81,"type":"single","difficulty":"进阶","stem":"航测前用远处地物完成对焦并按任务要求锁定，主要为了避免什么？","options":["航段中自动快门导致曝光时间变化","航段中自动白平衡导致色温变化","航段中自动测光导致亮度变化","航段中反复搜焦导致清晰度变化"],"answer":[3],"explanation":"AI 生成、仅供复习参考。知识点：相机对焦。A项错误：快门由曝光控制非焦点锁定控制。B项错误：白平衡影响色彩不是锁焦解决的问题。C项错误：测光亮度应由曝光设定管理。D项正确：锁焦防止焦点变化造成不清晰。","tier":"挑战"},{"id":82,"type":"single","difficulty":"进阶","stem":"其他条件相同时，将喷雾雾滴调得更细，作业评估需关注哪项权衡？","options":["覆盖改善与漂移风险增加","覆盖改善与漂移必然减少","覆盖下降与漂移必然消失","覆盖不变与漂移只由药色决定"],"answer":[0],"explanation":"AI 生成、仅供复习参考。知识点：喷洒粒径权衡。A项正确：细滴可改善覆盖但易随气流漂移需依标签设备评估。B项错误：不能断言漂移必然减少。C项错误：细滴并不消除漂移。D项错误：药液颜色不是漂移主因。","tier":"挑战"},{"id":83,"type":"single","difficulty":"进阶","stem":"作业幅宽四米、地速每秒三米、施用量每公顷十升，理想总流量约多少？","options":["每分钟零点七二升","每分钟二点一六升","每分钟一点四四升","每分钟零点三六升"],"answer":[0],"explanation":"AI 生成、仅供复习参考。知识点：喷洒流量计算。A项正确：覆盖速率12平方米每秒乘10除10000升每平方米再乘60得0.72。B项错误：2.16多算两倍。C项错误：1.44多算一倍。D项错误：0.36少算一半。","tier":"挑战"},{"id":84,"type":"single","difficulty":"进阶","stem":"农业喷洒邻近鱼塘且药剂标签提示水生生物风险，航线设置应优先考虑哪项？","options":["只把药量加倍以减少重复航次","按标签和现场条件设置缓冲防漂移","只提高喷洒高度以扩大单次幅宽","只按田块边界贴塘岸执行喷洒"],"answer":[1],"explanation":"AI 生成、仅供复习参考。知识点：复合作业风险。A项错误：加倍药量可能违法且不能防漂移。B项正确：需综合标签限制与风向水体保护。C项错误：增高可能增加漂移不能替代缓冲。D项错误：贴岸忽视漂移风险。","tier":"挑战"},{"id":85,"type":"single","difficulty":"进阶","stem":"设备说明仅允许在规定的轻微水溅条件使用，持续降雨前应怎样理解该限制？","options":["按说明限制评估并停止超限使用","靠擦干遥控器替代机体防雨","靠提高飞行速度补偿持续淋雨","将防水描述视作全天候许可"],"answer":[0],"explanation":"AI 生成、仅供复习参考。知识点：防水等级边界。A项正确：限定水溅能力不能推定持续雨中适用。B项错误：遥控器干燥不代表机体可淋雨。C项错误：高速不保证消除进水。D项错误：防水能力有测试边界。","tier":"挑战"},{"id":86,"type":"single","difficulty":"进阶","stem":"无人机维修更换关键部件后准备再次执行任务，宜采用哪种验证安排？","options":["按手册检查并完成必要测试飞行","用旧飞行日志替代维修后功能测试","地面解锁成功即视为通过全部验证","直接投入远程任务检验维修质量"],"answer":[0],"explanation":"AI 生成、仅供复习参考。知识点：维护复飞。A项正确：需验证安装功能并完成规定测试。B项错误：旧日志不能说明维修后的状态。C项错误：解锁不证明所有功能合格。D项错误：远程任务不适合作初次验证。","tier":"挑战"},{"id":87,"type":"single","difficulty":"进阶","stem":"多旋翼装载下挂设备后，静态间隙虽可见但载荷摆动时可能进入桨叶扫掠区，起飞前应怎样处理？","options":["重新固定载荷保证规定动态净空","仅检查静态间隙后批准任务起飞","仅减小航线速度后保留柔性悬挂","仅缩短飞行航时后保留原有间隙"],"answer":[0],"explanation":"AI 生成、仅供复习参考。知识点：螺旋桨净空。A项正确：需考虑动态位移确保载荷不接触桨叶。B项错误：静态可见不代表运动时有足够净空。C项错误：减速不能消除全部摆动及干涉。D项错误：航时不解决几何接触风险。","tier":"挑战"},{"id":88,"type":"multi","difficulty":"进阶","stem":"上传自动航线后正式执行前，哪些内容应重点复核？","options":["航线速度及转弯所需可行空间","只要航线可显示就免查单位和基准","坐标高度基准及实际航点位置","只要各航点合法就免查航点间路径"],"answer":[0,2],"explanation":"AI 生成、仅供复习参考。知识点：自动航线复核。A项正确：速度和转弯空间影响执行轨迹。B项错误：显示成功不证明输入参数正确。C项正确：错误基准位置可导致撞地或越界。D项错误：航点间路径仍可能越界或撞障。","tier":"挑战"},{"id":89,"type":"single","difficulty":"挑战","stem":"多旋翼在无定位保持的姿态模式中受稳定侧风影响而向一侧漂移，空域允许且操控正常，应怎样操作？","options":["关闭遥控器期待位置恢复功能","松开全部操纵等自动回到原点","仅转动相机方向抵消机体漂移","人工抵消漂移并准备安全降落"],"answer":[3],"explanation":"AI 生成、仅供复习参考。知识点：悬停模式案例。A项错误：关遥控不恢复定位且增加失控风险。B项错误：松杆可能继续随风漂移。C项错误：相机动作不能抵消机体平移。D项正确：姿态模式不保证地面位置需人工修正并评估降落。","tier":"挑战"},{"id":90,"type":"single","difficulty":"挑战","stem":"双地面站任务中第二操控员准备接管但未收到当前飞行状态和接管确认，航空器保持稳定飞行时应怎样处理？","options":["由原操控员保持控制并完成交接确认","原操控员先断开链路迫使新站接管","两名操控员同时输入指令再判断控制权","第二操控员先改航点验证能否抢占控制"],"answer":[0],"explanation":"AI 生成、仅供复习参考。知识点：控制权移交案例。A项正确：需明确控制权并按规定交接状态和确认。B项错误：断链可能触发失控程序而非安全交接。C项错误：同时操作可造成冲突。D项错误：改航点抢占未完成确认可能产生意外航迹。","tier":"挑战"},{"id":91,"type":"single","difficulty":"挑战","stem":"厂商地图显示可飞而政府最新公布该区域属管制空域，尚未取得所需批准时，应怎样处理？","options":["按地图没有警告认定不需要批准","按旧航迹曾飞过认定仍可起飞","按厂商地图正常解锁后直接起飞","按官方范围核查批准后再决定起飞"],"answer":[3],"explanation":"AI 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生成、仅供复习参考。知识点：返场能量案例。A项错误：悬停继续耗能。B项错误：继续拍摄消耗能量且最大速度未必最省。C项错误：阈值修改不增加实际能量。D项正确：需尽早用可用能量完成安全降落。","tier":"挑战"},{"id":98,"type":"single","difficulty":"挑战","stem":"航测软件要求椭球高而控制点表提供正常高，直接混用后成果出现系统高程偏差，应怎样处理？","options":["明确基准按可靠转换方法处理","按照片平均地速统一修正高度","按水平坐标缩放比例修正高度","按两地地表坡度统一修正高度"],"answer":[0],"explanation":"AI 生成、仅供复习参考。知识点：测绘高程案例。A项正确：不同高程基准需可靠转换及检核。B项错误：地速不决定基准差。C项错误：水平缩放不能替代垂直基准转换。D项错误：地表坡度不能给出高程基准差。","tier":"挑战"},{"id":99,"type":"single","difficulty":"挑战","stem":"无人机已进入最后降落阶段，人员突然走入降落区，仍有足够能量和安全复飞空间，应怎样处理？","options":["让观察员进入旋翼下方赶走人员","继续下降用旋翼气流提醒人员","加快下降争取在人靠近前停机","中止降落按程序复飞并重新隔离"],"answer":[3],"explanation":"AI 生成、仅供复习参考。知识点：降落区侵入案例。A项错误：人员进入旋翼下方也有风险。B项错误：旋翼气流不能作为安全警告工具。C项错误：加快下降增加接触风险。D项正确：先避免人与旋翼接近再重建安全条件。","tier":"挑战"},{"id":100,"type":"single","difficulty":"挑战","stem":"任务中出现一次异常姿态告警但落地检查无明显破损，准备下一班作业时应怎样处理？","options":["只看外壳完好便认定没有异常","保存日志按手册排查再确认可飞","让下一班远飞再次触发定位原因","清除告警记录避免影响下次任务"],"answer":[1],"explanation":"AI 生成、仅供复习参考。知识点：任务后日志案例。A项错误：外观正常不能排除内部或控制问题。B项正确：需保留证据分析异常并验证状态。C项错误：以远飞试错增加风险。D项错误：清除记录妨碍定位原因。","tier":"挑战"},{"id":101,"type":"single","stem":"飞行中机载系统突然报出IMU校准异常，但姿态指示仍稳定，应先执行哪项检查？","options":["核对卫星定位状态与信号强度","立即切换至姿态模式观察响应","检查当前飞行高度与风速","记录异常时间点继续任务"],"answer":[1],"explanation":"知识点：传感器故障处置。姿态模式可隔离GPS依赖验证基础稳定性；定位状态无关IMU问题；高度风速非直接关联；继续任务可能扩大风险。","tier":"挑战"},{"id":102,"type":"single","stem":"多旋翼在150米高度悬停时遭遇连续下沉气流，功率输出已达85%，应优先采用哪种策略？","options":["增大俯仰角争取爬升高度","保持姿态逐步降低高度","立即全油门紧急爬升","切换运动模式高速脱离"],"answer":[1],"explanation":"知识点：能量管理。降低高度可恢复动力余量；悬停状态大俯仰角易失稳；全油门可能触发过载保护；运动模式耗电更快。","tier":"进阶"},{"id":103,"type":"single","stem":"农业喷洒作业中，药液箱剩余10%药剂时出现泵体异响，应首先检查什么？","options":["喷头堵塞情况","管路进气可能性","电池电压波动","流量传感器校准"],"answer":[1],"explanation":"知识点：喷洒系统故障。低液位易导致管路进气；喷头堵塞表现不同；电压波动无关特定液位；流量异常为次级症状。","tier":"进阶"},{"id":104,"type":"single","stem":"海拔2000米场地的飞行器最大起飞重量标注为25kg，该重量基准对应的气压高度是？","options":["场地实际海拔高度","标准海平面气压高度","起降点修正QNH值","飞行器重心测量高度"],"answer":[1],"explanation":"知识点：性能参数基准。起飞重量以标准海平面为基准；实际海拔影响可用功率；QNH用于高度表拨正；重心与重量基准无关。","tier":"进阶"},{"id":105,"type":"single","stem":"固定翼无人机放下襟翼30度着陆时，突发动力失效且高度不足，应优先保持什么？","options":["当前俯仰姿态避免失速","立即收襟翼减小阻力","压杆增大下滑角","全力拉杆争取高度"],"answer":[0],"explanation":"知识点：应急姿态控制。大襟翼角需严防失速；收襟翼会突然减小升力；增大下滑角加速坠地；拉杆加剧能量损失。","tier":"进阶"},{"id":106,"type":"single","stem":"夜航时发现无人机航向灯亮度明显减弱，但防撞灯正常，当前任务应如何处理？","options":["立即返航更换灯光组件","降低飞行高度继续作业","缩短任务半径保持可视","启用备用照明系统"],"answer":[2],"explanation":"知识点：灯光失效处置。防撞灯满足基本避撞需求；降低高度未必改善可视性；组件更换非紧急事项；多数无人机无备用灯光。","tier":"挑战"},{"id":107,"type":"single","stem":"飞行手册标注的30分钟续航时间，对应的典型气象条件是？","options":["气温25℃无风","标准大气海平面","厂家测试环境温度","任务场地实测风况"],"answer":[1],"explanation":"知识点：性能测试基准。续航时间以标准大气为基准；25℃为常见但不标准；测试温度可能不同；实测风况影响实际续航。","tier":"进阶"},{"id":108,"type":"single","stem":"巡检任务中发现图传延迟突增到800ms，但控制链路正常，应优先排查什么？","options":["天线极化方向匹配","地面站处理器负载","飞控数据链优先级","图像编码格式设置"],"answer":[3],"explanation":"知识点：图传延迟处置。编码格式变更影响显著；天线方向问题应表现持续；处理器负载通常渐变；控制链路独立于图传。","tier":"挑战"},{"id":109,"type":"single","stem":"多旋翼在自动航线飞行中，高度传感器突然显示-5米但视觉确认实际高度正常，应如何应对？","options":["立即切换手动模式修正","检查气压计校准状态","继续任务关注其他传感器","执行紧急返航程序"],"answer":[0],"explanation":"知识点：传感器冲突处置。手动模式可超越错误数据；校准需地面进行；继续任务存在碰撞风险；未失联无需紧急返航。","tier":"挑战"},{"id":110,"type":"single","stem":"执行电力巡线任务时，激光雷达点云出现规律性条纹，最可能的原因是？","options":["飞行速度超出标定范围","高压线路电磁干扰","惯导系统未预热充分","explanation"],"answer":[0],"explanation":"知识点：激光雷达数据异常。速度超限导致扫描间隔不均；电磁干扰表现为噪声而非条纹；惯导预热不足引发放大误差。","tier":"进阶"},{"id":111,"type":"multi","stem":"哪些情况必须立即终止喷洒作业？","options":["风向突变使药雾飘向禁飞区","单个喷头流量下降30%","作业人员防护装备破损","地面风速达到设计上限","电池循环次数超过告警值"],"answer":[0,2,3],"explanation":"知识点：作业中止条件。药雾污染、人员安全、超限风速必须停止；单喷头故障可应急处理；循环次数为预防性提示。","tier":"进阶"},{"id":112,"type":"single","stem":"固定翼在转弯爬升中同时出现失速警报和高度损失，应优先修正什么？","options":["减小坡度角改平机翼","增加油门补充动力","推杆降低迎角恢复气流","反向蹬舵平衡侧滑"],"answer":[0],"explanation":"知识点：复合状态改出。坡度角是失速主因需优先消除；加油门可能加剧失速；推杆在转弯中危险；侧滑非当前主要矛盾。","tier":"进阶"},{"id":113,"type":"single","stem":"无人机在人口稠密区上空飞行时，其与地面人员或物体的最小垂直间隔应为多少米？","options":["30米","50米","100米","120米"],"answer":[1],"explanation":"知识点：安全间隔规定。50米是法规规定的最小垂直间隔；30米适用于非人口稠密区；100米和120米是干扰项。","tier":"基础"},{"id":114,"type":"single","stem":"多旋翼无人机在悬停状态下，突然遭遇持续侧风，应优先采取哪种操作？","options":["立即降落","调整航向迎风","增加高度躲避","保持当前位置"],"answer":[1],"explanation":"知识点：侧风处置。迎风调整可稳定姿态；立即降落存在风险；增高可能加剧漂移；保持位置会导致失控。","tier":"挑战"},{"id":115,"type":"single","stem":"无人机锂电池在15°C环境下存储，最佳充电电压应为多少？","options":["3.7V/单体","3.8V/单体","4.0V/单体","4.2V/单体"],"answer":[1],"explanation":"知识点：电池管理。3.8V是推荐存储电压；3.7V过低；4.0V和4.2V是充电上限而非存储电压。","tier":"进阶"},{"id":116,"type":"single","stem":"在雾天飞行时，视觉观察系统(VLOS)的最主要限制因素是？","options":["能见度降低","空气湿度增加","温度变化","风速增大"],"answer":[0],"explanation":"知识点：气象影响。能见度是VLOS核心指标；湿度影响设备但非主要；温度和风速影响次之。","tier":"进阶"},{"id":117,"type":"single","stem":"执行夜间飞行时，无人机必须配备哪种灯光？","options":["红色防撞灯","白色航向灯","绿色位置灯","蓝色识别灯"],"answer":[0],"explanation":"知识点：灯光配置。红色防撞灯是强制要求；其他灯光为可选辅助。","tier":"进阶"},{"id":118,"type":"single","stem":"无人机在适飞空域内飞行，最大飞行高度不应超过多少米？","options":["100米","120米","150米","200米"],"answer":[1],"explanation":"知识点：空域限制。120米是法规上限；100米是建议值；150米和200米超出限制。","tier":"基础"},{"id":119,"type":"single","stem":"飞行中遥控信号丢失且无人机未进入返航模式，首先应检查？","options":["电池电量","GPS信号","失控保护设置","图传信号"],"answer":[2],"explanation":"知识点：应急处置。失控保护是首要检查项；其他选项为次要因素。","tier":"进阶"},{"id":120,"type":"single","stem":"多旋翼无人机在10m/s风速下作业，应特别注意？","options":["缩短飞行距离","增加电池电量","降低飞行高度","减少有效载荷"],"answer":[3],"explanation":"知识点：风况作业。减载提升机动性；其他选项对抗风帮助有限。","tier":"进阶"},{"id":121,"type":"single","stem":"飞行记录仪数据显示某次飞行最大俯仰角达到35°，说明该次飞行？","options":["操作正常","存在风险","电池异常","GPS故障"],"answer":[1],"explanation":"知识点：数据分析。超过30°为危险状态；其他选项无直接关联。","tier":"进阶"},{"id":122,"type":"single","stem":"执行电力巡线任务时，无人机与高压导线的最小安全距离应为？","options":["5米","10米","15米","20米"],"answer":[0],"explanation":"知识点：特殊作业安全。5米是行业标准；其他距离过大影响作业效果。","tier":"基础"},{"id":123,"type":"multi","stem":"哪些情况必须立即终止飞行？","options":["遥控器电量低于20%","GPS信号丢失超过30秒","出现持续性姿态异常告警","图传延迟超过500ms"],"answer":[1,2],"explanation":"知识点：紧急处置。GPS丢失和姿态异常必须终止；遥控器电量可监控；图传延迟可忍受。","tier":"进阶"},{"id":124,"type":"single","stem":"固定翼无人机在起飞滑跑阶段，当空速达到抬前轮速度但未离地时，正确的操纵方式是？","options":["保持当前升降舵位置继续加速","柔和拉杆使飞机离地","立即全油门下推杆中断起飞","减少油门等待自动离地"],"answer":[1],"explanation":"知识点：起飞操纵。柔和拉杆符合正常程序；保持位置可能导致过速滑跑；中断起飞需判断跑道余量；自动离地不可靠。","tier":"进阶"},{"id":125,"type":"single","stem":"执行夜间飞行的多旋翼无人机，其航向灯失效但防撞灯正常时，最低能见度要求应提高至？","options":["500米","1公里","3公里","5公里"],"answer":[2],"explanation":"知识点：夜间飞行要求。航向灯失效需更高能见度补偿；1公里不足保障避碰；5公里过于保守。","tier":"进阶"},{"id":126,"type":"single","stem":"多旋翼无人机在150米高度正常飞行时，遥控链路突然中断且未触发自动返航，最可能的原因是？","options":["返航高度设置低于当前高度","遥控器电池电量不足","飞控系统检测到GPS失效","飞行区域处于电子围栏限制区"],"answer":[0],"explanation":"知识点：失控保护。返航高度不足会导致不触发；电量不足通常有预警；GPS失效不影响链路；电子围栏会限制起飞。","tier":"挑战"},{"id":127,"type":"single","stem":"农业喷洒作业时，喷雾系统出现持续漏药但任务已完成80%，应如何处置？","options":["降低飞行高度继续作业","立即着陆检查维修","减少流量维持作业","切换备用泵继续完成"],"answer":[1],"explanation":"知识点：应急处置。漏药可能污染环境需立即停止；降低高度加剧污染；减少流量无法解决问题；备用泵需提前配置。","tier":"进阶"},{"id":128,"type":"single","stem":"海拔2000米场地执行任务时，实测气温比标准大气高15°C，对无人机最大起飞重量的影响是？","options":["可增加5%载荷","需减少10%载荷","不影响原定载荷","需重新计算升力系数"],"answer":[1],"explanation":"知识点：高原飞行性能。高温高原空气密度降低需减载；增载危险；必须重新评估性能。","tier":"进阶"},{"id":129,"type":"single","stem":"巡检任务中图传画面出现规律性条纹，但可见光相机正常，最可能故障的部件是？","options":["数传天线","云台减震球","激光雷达电机","红外热像仪"],"answer":[2],"explanation":"知识点：设备故障判断。电机振动导致条纹；天线故障影响信号非图像；减震球异常影响稳定性；热像仪故障表现为噪点。","tier":"进阶"},{"id":130,"type":"single","stem":"执行电力巡线时，无人机需穿越两相导线之间，最小水平间隔应保持？","options":["1米","3米","5米","10米"],"answer":[2],"explanation":"知识点：电力作业安全。5米是防止电弧放电的最小距离；1-3米风险过高；10米过于保守影响作业。","tier":"基础"},{"id":131,"type":"single","stem":"多旋翼在自动航线飞行中，视觉系统检测到前方50米处有移动障碍物，正确的避让策略是？","options":["立即切换手动控制","保持航线速度爬升高度","触发预设避障悬停程序","加速通过障碍区域"],"answer":[2],"explanation":"知识点：智能避障。预设程序最安全可靠；手动控制反应滞后；爬升可能不及避让；加速增加碰撞风险。","tier":"进阶"},{"id":132,"type":"single","stem":"锂电池在5°C环境温度下充电时，正确的预处理方法是？","options":["置于40°C温箱加热30分钟","连接充电器以小电流预热","先放电至10%再充电","直接以标准模式充电"],"answer":[1],"explanation":"知识点：低温充电。小电流预热最安全；加热箱可能过热；放电加剧损伤；直接充电可能析锂。","tier":"进阶"},{"id":133,"type":"single","stem":"固定翼无人机在最后进近阶段遭遇持续阵风，正确的修正方法是？","options":["保持油门与升降舵恒定","交替调节油门与舵面补偿","改平飞等待风况稳定","执行复飞选择备降场地"],"answer":[1],"explanation":"知识点：风切变处置。动态调节最有效；保持恒定易失控；改平飞延长风险；复飞应为最后选项。","tier":"进阶"},{"id":134,"type":"single","stem":"多旋翼无人机在海拔2000米执行任务时，最大允许起飞重量通常比海平面标准低多少百分比？","options":["5%","10%","15%","20%"],"answer":[2],"explanation":"知识点：高原飞行性能修正。海拔每升高1000米发动机功率下降约10-15%，对应最大起飞重量修正；5%为低海拔修正值；20%为极端高原情况。","tier":"基础"},{"id":135,"type":"single","stem":"固定翼无人机在转弯爬升时遭遇风切变，应优先保持哪个飞行参数？","options":["坡度角","空速","俯仰角","航向"],"answer":[1],"explanation":"知识点：风切变处置。空速是判断失速风险的关键指标；坡度角和俯仰角需配合空速调整；航向在风切变中次要。","tier":"进阶"},{"id":136,"type":"single","stem":"农业喷洒作业时，喷雾覆盖宽度由4米减小到3米，但要求单位面积施药量不变，应如何调整总流量？","options":["增加25%","减少25%","增加33%","减少33%"],"answer":[2],"explanation":"知识点：流量计算。覆盖宽度减少25%，为保持施药量需相应增加流量；25%为宽度变化值非流量修正值；33%为宽度变化倒数关系。","tier":"进阶"},{"id":137,"type":"single","stem":"无人机锂电池在5°C环境温度下充电前，正确的预处理方法是？","options":["常温静置30分钟","用暖风枪加热至20°C","小电流预充至10%电量","放电至10%再充电"],"answer":[0],"explanation":"知识点：锂电池低温充电。常温静置最安全；加热可能不均匀；预充仍需温度恢复；放电会加剧低温损伤。","tier":"进阶"},{"id":138,"type":"single","stem":"执行电力巡线任务时，无人机与500kV高压导线的最小水平安全距离应为？","options":["3米","5米","8米","10米"],"answer":[1],"explanation":"知识点：电力设施安全间隔。500kV安全距离为5米；3米适用于220kV；8-10米为超高压线路标准。","tier":"基础"},{"id":139,"type":"single","stem":"无人机夜航时突发航向灯失效，但仍有防撞灯，最低能见度要求应提高至？","options":["1公里","3公里","5公里","无需调整"],"answer":[1],"explanation":"知识点：夜航灯光要求。航向灯失效需加倍能见度；1公里为昼间VLOS标准；5公里为极端情况；不可不调整。","tier":"进阶"},{"id":140,"type":"single","stem":"固定翼无人机在最后进近阶段遭遇持续逆风突变，正确的修正策略是？","options":["增加油门保持高度","减小襟翼角度","提前接地点","保持俯仰角不变"],"answer":[0],"explanation":"知识点：风切变着陆处置。逆风减小需补充能量；减襟翼会恶化升力；提前接地风险大；固定姿态不解决能量问题。","tier":"进阶"},{"id":141,"type":"single","stem":"无人机在人口稠密区上空飞行时，与建筑物之间的最小水平间隔应为？","options":["10米","30米","50米","100米"],"answer":[1],"explanation":"知识点：人口稠密区飞行限制。30米为安全缓冲距离；10米不足应急反应；50-100米适用于更高风险场景。","tier":"基础"},{"id":142,"type":"multi","stem":"哪些情况必须立即终止农药喷洒作业？","options":["药液剩余10%出现泵体异响","风速达到8m/s阵风10m/s","发现作业区边缘有儿童","图传延迟增大到500ms"],"answer":[1,2],"explanation":"知识点：喷洒作业终止条件。大风和人员进入为强制终止项；泵体异响需检查非立即停止；图传延迟可暂缓作业。","tier":"进阶"},{"id":143,"type":"single","stem":"飞行中系统提示电机温度达到90°C但仍在安全阈值内，后续操作应特别注意？","options":["缩短单次飞行时间","立即降落冷却","降低最大爬升率","关闭温度告警"],"answer":[2],"explanation":"知识点：电机过热处置。降低功率需求最有效；未超阈值不需立即降落；缩短时间治标不治本；关闭告警违反安全原则。","tier":"进阶"},{"id":144,"type":"single","stem":"多旋翼无人机在海拔3000米场地作业时，最大允许起飞重量通常比海平面减少多少百分比？","options":["10%-15%","20%-25%","30%-35%","40%-45%"],"answer":[1],"explanation":"知识点：高原飞行性能。海拔每升高1000米，空气密度降低约10%，为保持升力需减重20%-25%；40%以上减重可能过度影响任务载荷。","tier":"进阶"},{"id":145,"type":"single","stem":"锂电池在0°C环境下充电前，正确的预处理方法是什么？","options":["直接以0.5C电流充电至25°C","静置2小时待其自然升温","用保温箱加热至10°C以上再充电","放电至20%电量后再尝试充电"],"answer":[2],"explanation":"知识点：低温充电规范。锂电池需在10°C以上充电；保温箱加热安全可控；直接充电可能引发锂枝晶；放电无法解决低温问题。","tier":"基础"},{"id":146,"type":"single","stem":"执行电力巡线时，无人机与220kV高压导线的最小水平安全距离应为？","options":["3米","5米","7米","10米"],"answer":[1],"explanation":"知识点：电磁干扰防护。220kV导线周围强电磁场需保持5米距离；3米可能受干扰；7米/10米超实际需求。","tier":"基础"},{"id":147,"type":"single","stem":"固定翼无人机在最后进近时遭遇持续顺风突变，正确的修正策略是？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已含沉淀物；15%以上浪费作业时间。","tier":"基础"},{"id":171,"type":"single","stem":"多旋翼无人机在自动返航过程中遭遇持续侧风，应优先采取什么策略？","options":["降低返航高度减小风影响","增大返航速度快速通过风区","保持航线让飞控自动补偿","手动介入修正风偏"],"answer":[2],"explanation":"知识点：自动返航逻辑。飞控具有持续风偏补偿能力；降低高度可能增加碰撞风险；增大速度消耗过多电量；手动介入违背自动化设计。","tier":"进阶"},{"id":172,"type":"single","stem":"执行夜间搜救任务时，无人机探照灯的最佳照射角度应为？","options":["垂直向下90度","前倾30度","前倾15度","侧向45度"],"answer":[2],"explanation":"知识点：夜间照明技术。15度前倾既保证照射距离又维持地面亮度；90度局限小范围；30度以上地面照度不足；侧向照明不适用搜索。","tier":"进阶"},{"id":173,"type":"single","stem":"在气温35°C的高温环境下，多旋翼无人机连续作业的推荐最长单次飞行时间为？","options":["10分钟","15分钟","20分钟","25分钟"],"answer":[1],"explanation":"知识点：高温运行限制。15分钟平衡散热需求与作业效率；20分钟以上可能触发过热保护；10分钟作业效率过低。","tier":"基础"},{"id":174,"type":"multi","stem":"无人机飞行前检查中，哪些情况必须立即中止飞行？","options":["GPS卫星数≤8颗且HDOP＞2.0","遥控器天线出现轻微裂纹但信号正常","电机运转时有间歇性异响","电池单片电压差≥0.1V","云台自检时出现偶发抖动"],"answer":[0,2,3],"explanation":"知识点：飞行中止标准。GPS精度不足、电机异响和电压差超标直接影响安全；天线裂纹需评估但不一定停飞；云台抖动属性能问题。","tier":"挑战"},{"id":175,"type":"single","stem":"固定翼无人机在转弯时遭遇强烈下沉气流，应优先保持哪个飞行参数？","options":["空速","高度","坡度","航向"],"answer":[0],"explanation":"知识点：风切变处置。保持空速是改出下沉气流的关键；强行保持高度可能导致失速；坡度/航向修正需建立在空速稳定基础上。","tier":"进阶"},{"id":176,"type":"single","stem":"多旋翼无人机在海拔1000米作业时，动力系统效率通常比海平面降低多少百分比？","options":["5%-10%","15%-20%","25%-30%","35%-40%"],"answer":[1],"explanation":"知识点：高原性能衰减。1000米高度空气密度下降约10%，导致动力效率下降15-20%；5-10%为500米高度衰减量；25%以上属于3000米以上高海拔衰减范围。","tier":"进阶"},{"id":177,"type":"single","stem":"固定翼无人机在转弯时遭遇强烈侧风，正确的修正策略是？","options":["增加坡度角抵消侧风","保持坡度增大方向舵量","减小坡度顺风压杆","维持原坡度增加升降舵"],"answer":[2],"explanation":"知识点：侧风修正。减小坡度可降低侧向受力，顺风压杆抵消偏移；增加坡度会加剧侧滑；单纯增大舵量效果有限；升降舵不解决侧向问题。","tier":"进阶"},{"id":178,"type":"single","stem":"执行电力巡线时发现无人机与导线距离不足3米，应首先采取？","options":["立即爬升高度","保持悬停上报指挥","反向杆量快速远离","关闭遥控器触发返航"],"answer":[0],"explanation":"知识点：紧急避障。爬升最快速建立安全间隔；悬停可能持续危险；反向操作易误判方向；关闭遥控在复杂空域更危险。","tier":"挑战"},{"id":179,"type":"single","stem":"多旋翼在自动返航时遭遇持续顺风，返航速度应？","options":["保持预设速度不变","增加20%-30%","降低10%-15%","根据风速自动调节"],"answer":[1],"explanation":"知识点：顺风返航策略。增速可抵消顺风导致的航迹延长；不变速度会延长返航时间；降速更危险；多数系统无自动调节功能。","tier":"进阶"},{"id":180,"type":"single","stem":"夜间VLOS飞行时，无人机与观察者之间突然出现强光源干扰，应？","options":["立即切换自动返航","保持高度开启所有灯光","下降至光源下方高度","侧向移动30米以上"],"answer":[3],"explanation":"知识点：光污染处置。侧移重建可视链路；自动返航在干扰下风险高；强光中灯光无效；下降可能进入更复杂环境。","tier":"挑战"},{"id":181,"type":"single","stem":"农业无人机喷洒作业中，药液雾滴粒径应控制在？","options":["50-100微米","150-250微米","300-400微米","450-550微米"],"answer":[1],"explanation":"知识点：雾滴粒径标准。150-250微米平衡飘移与覆盖；50-100微米飘移严重；300微米以上沉降过快；超500微米导致分布不均。","tier":"进阶"},{"id":182,"type":"single","stem":"气温30°C时锂电池最高允许工作温度为？","options":["40°C","50°C","60°C","70°C"],"answer":[2],"explanation":"知识点：电池工作温度。60°C为典型安全阈值；40°C是充电上限；50°C会触发预警；70°C有热失控风险。","tier":"进阶"},{"id":183,"type":"single","stem":"无人机在桥梁巡检时遭遇突然的桥墩涡流，应优先？","options":["增大油门对抗下沉","转向90°脱离涡流区","保持姿态等待通过","下降高度避开乱流"],"answer":[1],"explanation":"知识点：涡流处置。转向最快脱离扰动区；加油门可能加剧失控；等待延长危险时间；下降可能进入更强乱流。","tier":"挑战"},{"id":184,"type":"single","stem":"多旋翼在人口稠密区执行航拍，突发图传卡顿但遥控信号正常，应？","options":["继续任务观察信号","切换备用通信频道","立即上升至安全高度","按原路径返航降落"],"answer":[2],"explanation":"知识点：图传故障处置。上升可改善信号环境；继续任务风险高；切换频道不解决遮挡问题；原路返航可能持续卡顿。","tier":"进阶"},{"id":185,"type":"multi","stem":"哪些情况下必须中止锂电池充电？","options":["电池表面温度达到45°C","单体电压差超过0.3V","充电电流异常波动","外壳出现轻微膨胀","环境湿度超过80%"],"answer":[1,2,3],"explanation":"知识点：充电中止条件。电压差、电流波动和膨胀都是危险征兆；45°C在安全范围内；湿度影响充电效率但不直接危险。","tier":"进阶"},{"id":186,"type":"single","stem":"固定翼无人机在20m/s顺风条件下着陆，接地点应比无风条件？","options":["提前30%-40%","提前15%-25%","延后10%-20%","延后30%-50%"],"answer":[0],"explanation":"知识点：顺风着陆修正。强顺风需大幅提前接地；15-25%适用于10m/s风速；延后会导致跑道溢出；超50%修正过度。","tier":"进阶"},{"id":187,"type":"single","stem":"多旋翼无人机在海拔2000米作业时，电机KV值应比海平面降低多少百分比？","options":["5%-8%","10%-15%","18%-22%","25%-30%"],"answer":[1],"explanation":"知识点：高原电机适配。10%-15%可平衡空气密度下降与升力需求；5%-8%调整不足；18%以上过度降低影响响应速度；25%以上超出常规调整范围。","tier":"进阶"},{"id":188,"type":"single","stem":"锂电池在-10°C环境下放电容量降至标称值的多少时需立即终止飞行？","options":["60%","50%","40%","30%"],"answer":[2],"explanation":"知识点：低温电池性能。40%是安全阈值；60%/50%仍有可用容量；30%已可能触发过放。","tier":"基础"},{"id":189,"type":"single","stem":"执行电力巡线时无人机与1000kV特高压导线的最小水平距离应为？","options":["8米","15米","20米","30米"],"answer":[3],"explanation":"知识点：特高压安全间距。30米为规程要求；8米/15米适用于中低压线路；20米是750kV标准距离。","tier":"基础"},{"id":190,"type":"multi","stem":"哪些情况会导致多旋翼无人机在悬停时出现持续水平漂移？","options":["IMU校准场地有磁场干扰","螺旋桨存在轻微变形","GPS定位精度降至3米以下","电池电压瞬时波动超过0.5V","云台相机负载突然偏移"],"answer":[0,1,2],"explanation":"知识点：悬停稳定性。磁场干扰和桨叶变形直接影响姿态控制；GPS精度不足导致定位漂移；电压波动和负载偏移通常引发瞬时抖动而非持续漂移。","tier":"挑战"},{"id":191,"type":"single","stem":"固定翼无人机逆风6m/s着陆时，接地点应比无风条件延长多少百分比？","options":["10%","20%","30%","40%"],"answer":[2],"explanation":"知识点：逆风着陆修正。30%可抵消逆风导致的减速效应；10%/20%修正不足；40%过度延长可能冲出跑道。","tier":"基础"},{"id":192,"type":"single","stem":"视距内无人机飞行时，驾驶员必须保持与无人机的直接目视接触距离不超过多少米？","options":["500米","1000米","1500米","2000米"],"answer":[0],"explanation":"知识点：视距内飞行规定。正确项500米是CAAC规定的最远目视接触距离。错误项1000米/1500米是超视距飞行常见距离，2000米远超视距内标准。","tier":"基础"},{"id":193,"type":"single","stem":"无人机在融合空域进行超视距飞行时，必须安装的通讯设备是？","options":["ADS-B发射机","无线电应答机","手机数据链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em":"无人机在飞行中遇到GPS信号丢失时，应立即采取的措施是？","options":["切换至手动模式","继续等待GPS恢复","尝试重启GPS模块","保持自动飞行模式"],"answer":[0],"explanation":"GPS信号丢失时，应立即切换至手动模式，以确保对无人机的完全控制。继续等待GPS恢复可能导致失控，重启GPS模块可能来不及，保持自动飞行模式不可靠。","tier":"挑战"},{"id":285,"type":"single","stem":"无人机在飞行中遭遇鸟类群时，应如何应对？","options":["加速通过","缓慢下降","保持高度","紧急避让"],"answer":[3],"explanation":"遭遇鸟类群时，应紧急避让，以避免与鸟类碰撞。加速通过可能增加碰撞风险，缓慢下降和保持高度都无法有效避免碰撞。","tier":"进阶"},{"id":286,"type":"single","stem":"无人机在飞行中遇到浓雾时，应优先采取的措施是？","options":["升高飞行高度","降低飞行速度","开启额外照明","返航降落"],"answer":[3],"explanation":"浓雾条件下，应优先返航降落，以确保飞行安全。升高高度可能无法避开浓雾，降低速度无法改善能见度，开启额外照明在浓雾中效果有限。","tier":"挑战"},{"id":287,"type":"single","stem":"无人机在飞行中遭遇雷雨天气时，应首先考虑的操作是？","options":["寻找避难所","降低飞行高度","继续飞行任务","立即返航"],"answer":[3],"explanation":"遭遇雷雨天气时，应立即返航，以避免雷击和强气流对无人机的损害。寻找避难所不适用于无人机，降低高度无法避开雷雨，继续飞行任务极其危险。","tier":"进阶"},{"id":288,"type":"single","stem":"无人机在飞行中遇到电磁干扰时，应如何应对？","options":["切换至手动模式","继续尝试自动飞行","重启遥控器","关闭电子设备"],"answer":[0],"explanation":"电磁干扰时，应切换至手动模式，以确保对无人机的控制。继续尝试自动飞行可能导致失控，重启遥控器可能来不及，关闭电子设备无法解决问题。","tier":"挑战"},{"id":289,"type":"single","stem":"无人机在飞行中遇到通信链路中断时，应如何应对？","options":["等待链路恢复","尝试重新连接","启用返航功能","手动操控降落"],"answer":[2],"explanation":"通信链路中断时，应启用返航功能，以确保无人机安全返回。等待链路恢复和尝试重新连接可能来不及，手动操控降落可能无法准确定位。","tier":"挑战"},{"id":290,"type":"single","stem":"无人机在飞行过程中，哪种气象条件最容易导致电池性能急剧下降？","options":["高温高湿","低温低湿","低温高湿","高温低湿"],"answer":[2],"explanation":"低温高湿条件最容易导致电池性能急剧下降，因为低温会降低电池的化学反应速率，而高湿可能加剧电池内部的电解液分解。高温高湿虽然也会影响电池，但低温高湿的影响更显著。低温低湿和高温低湿对电池性能的影响相对较小。","tier":"进阶"},{"id":291,"type":"multi","stem":"无人机在飞行过程中遇到突发强风时，应采取哪些应急处置措施？","options":["立即降低飞行高度以避风","保持飞行姿态稳定，缓慢降低高度","迅速返航至安全降落点","切换至手动模式进行紧急操控"],"answer":[1,2],"explanation":"知识点是无人机应急处置。正确项：保持飞行姿态稳定，缓慢降低高度（避免失控），迅速返航至安全降落点（确保安全）。错误项：立即降低飞行高度以避风（可能因风速突变导致失控），切换至手动模式进行紧急操控（需飞行员熟练掌握，否则风险更大）。","tier":"挑战"},{"id":292,"type":"single","stem":"无人机在视距内运行时，驾驶员对无人机保持持续目视接触的主要目的是什么","options":["确保能够实时判断无人机姿态与周围障碍","满足数据链传输距离对天线指向的要求","避免无人机超出遥控器电池的续航时间","保证机载相机始终对准地面目标"],"answer":[0],"explanation":"视距内运行的核心要求是驾驶员能直接目视观察无人机，以便实时判断其姿态、位置和与障碍物的关系。B项是超视距链路管理内容，与目视接触无直接因果；C项是动力续航问题，与目视无关；D项是任务载荷指向，不是视距内运行的定义目的。","tier":"进阶"},{"id":293,"type":"single","stem":"多旋翼无人机在悬停时突然出现一个电机转速下降，飞控通过增加对角电机转速来维持姿态，这主要利用了多旋翼的哪种控制方式","options":["差动拉力与反扭矩平衡","总距变化与周期变距","舵面偏转与气流偏转","重心偏移与机械配平"],"answer":[0],"explanation":"多旋翼通过改变各电机转速产生拉力差和反扭矩差来实现姿态与航向控制。B项是直升机旋翼控制方式；C项是固定翼舵面控制；D项是机械配平手段，均非多旋翼电调控制原理。","tier":"挑战"},{"id":294,"type":"single","stem":"无人机在飞行中遇到地磁异常导致航向估计偏差，飞控通常优先采用哪种传感器组合进行航向融合","options":["GNSS航迹角与惯性测量单元","气压高度计与超声波高度计","光流传感器与视觉里程计","电流计与电压传感器"],"answer":[0],"explanation":"GNSS可提供航迹角，IMU提供角速率和加速度，二者融合可在磁罗盘受扰时维持航向估计。B项用于高度测量；C项用于位置和速度辅助；D项用于电源管理，均不直接提供航向融合。","tier":"挑战"},{"id":295,"type":"single","stem":"固定翼无人机在逆风返航时，若保持相同的空速，其地速和航程会发生什么变化","options":["地速减小，单位时间航程缩短","地速增大，单位时间航程增加","地速不变，单位时间航程不变","地速减小，单位时间航程增加"],"answer":[0],"explanation":"地速等于空速与风速的矢量和，逆风时地速减小，单位时间前进距离缩短。B项是顺风情况；C项忽略风的影响；D项地速减小不可能导致单位时间航程增加。","tier":"挑战"},{"id":296,"type":"single","stem":"无人机在海拔较高的机场起飞时，相同起飞重量下所需起飞滑跑距离通常会怎样变化","options":["增加，因为空气密度降低导致升力减小","减少，因为空气密度降低导致阻力减小","不变，因为升力只与速度有关","增加，因为空气密度升高导致推力增大"],"answer":[0],"explanation":"高海拔空气密度低，相同空速下机翼产生的升力减小，需要更长滑跑距离达到离地速度。B项阻力减小不是主导因素且结论相反；C项升力与空气密度有关；D项高海拔空气密度降低而非升高。","tier":"挑战"},{"id":297,"type":"single","stem":"无人机作业时遥控器突然提示信号丢失，而飞控已设置自动返航，驾驶员首先应当做什么","options":["保持原地观察并等待无人机按程序返航","立即关闭遥控器以触发返航","立即切换飞行模式到姿态模式","立即操纵遥控器摇杆试图重新连接"],"answer":[0],"explanation":"信号丢失后飞控按预设程序自动返航，驾驶员应保持观察并准备接管。B项关闭遥控器可能改变链路状态或触发意外；C项在失联状态下无法保证指令到达；D项盲目摇杆输入可能干扰返航逻辑。","tier":"挑战"},{"id":298,"type":"single","stem":"无人机在人口密集区上空执行任务时，突然发现下方有群众聚集，正确的处置方式是","options":["立即爬升并绕飞，避开人群上空","保持高度继续执行原航线","下降高度以便更清楚观察","悬停等待人群自行散开"],"answer":[0],"explanation":"人口密集区上空飞行应避免飞越人群，发现聚集应爬升并绕飞。B项继续原航线会加大风险；C项下降高度增加对地面人员威胁；D项悬停仍处于人群上方，不符合安全要求。","tier":"挑战"},{"id":299,"type":"single","stem":"关于无人机空域管理中临时空域的说法，正确的是","options":["临时空域通常在特定时间段内划定并公布","临时空域一经划定长期有效无需公布","临时空域只能由无人机运营人自行设定","临时空域不需要任何批准即可进入"],"answer":[0],"explanation":"临时空域是为特定活动在特定时段划设并公布的。B项与临时性不符；C项空域划定不是运营人自行设定；D项进入空域仍需按规定批准或报备。","tier":"进阶"},{"id":300,"type":"single","stem":"无人机数据链中，上行链路和下行链路分别主要传输什么","options":["上行传输遥控指令，下行传输遥测与图像","上行传输图像，下行传输遥控指令","上行传输遥测，下行传输遥控指令","上行传输电源数据，下行传输导航数据"],"answer":[0],"explanation":"上行链路通常从地面站向无人机发送遥控指令，下行链路回传遥测、图像等数据。B项方向颠倒；C项遥测为下行；D项电源与导航数据不是链路划分的主要定义。","tier":"进阶"}]}