{"name":"美发师题库","level":"五级 / 四级 / 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2],"explanation":"知识点为提拉角度与剪发效果的关系。90度提拉配合垂直切口是制造层次的标准技术，使头发形成均匀落差；建立重量线通常用0度或低角度提拉；去除重量多用超过90度的高角度提拉；修剪刘海多用低角度点剪或滑剪。","tier":"基础"},{"id":256,"type":"single","stem":"顾客头发漂至8度后想染目标色6度冷棕，直接上色最可能出现的问题是","options":["颜色偏红偏暖","颜色偏绿偏冷","颜色偏黄偏亮","颜色偏灰偏暗"],"answer":[0],"explanation":"知识点为漂发后底色与目标色的关系。漂至8度底色残留橙黄色，直接染6度冷棕，底色中的暖色会透出使结果偏红偏暖；偏绿多因底色过浅或染膏偏冷过量；偏黄偏亮是漂后未上色的状态；偏灰偏暗多见于底色过浅加冷色过多。","tier":"进阶"},{"id":257,"type":"single","stem":"头皮护理中判断顾客为干性头皮的主要依据是","options":["洗发后一天即油腻","头皮有细小白色鳞屑","头皮泛红有丘疹","头皮有明显异味"],"answer":[1],"explanation":"知识点为头皮类型判断。干性头皮皮脂分泌少，常见细小白色鳞屑和紧绷感；洗发后一天即油腻是油性头皮特征；泛红有丘疹属敏感或炎症表现；明显异味多与油脂氧化或菌群失衡相关，不能单独作为干性判断依据。","tier":"进阶"},{"id":258,"type":"single","stem":"顾客要求剪一款短发，观察其头顶有一处逆生发旋，裁剪时正确的处理是","options":["将该处头发留长压住发旋","将该处头发剪短使其服帖","按发旋方向单独分片处理","全头统一长度不考虑发旋"],"answer":[2],"explanation":"知识点为发旋对短发裁剪的影响。发旋处发流方向异常，需单独分片顺应发流处理才能自然服帖；留长压住会形成厚重不自然的凸起；剪短会因发流逆向而翘起；全头统一长度会让发旋处明显翘乱。","tier":"进阶"},{"id":259,"type":"multi","stem":"下列属于烫发前必须进行的头皮与发质评估项目的有","options":["检查头皮有无破损或炎症","询问近期是否做过金属盐染发","测试头发湿发拉伸弹性","观察发梢分叉程度","确认顾客当日是否洗头"],"answer":[0,1,2],"explanation":"知识点为烫发前评估要点。检查头皮破损和询问金属盐染发史是安全前提，金属盐会与烫发剂反应；湿发拉伸弹性可判断发质承受力；观察发梢分叉只反映发尾状态，不是烫发安全必查项；当日是否洗头与烫发安全性无直接因果关系。","tier":"挑战"},{"id":260,"type":"single","stem":"顾客洗发后头发自然晾干时毛小皮边缘翘起、手感粗糙，但浸湿后拉伸不易断，该发质最接近","options":["干性受损发质","油性健康发质","中性健康发质","混合型健康发质"],"answer":[0],"explanation":"毛小皮翘起、手感粗糙是干性受损发质的典型表现，但湿拉不易断说明皮质层尚未严重空洞化；油性发质毛小皮平整且易显油腻；中性发质毛小皮完整、手感顺滑；混合型指头皮油而发梢干，题干未涉及头皮状态。","tier":"进阶"},{"id":261,"type":"single","stem":"给顾客做离子烫夹板定型时，若单束发片取得过厚，最可能出现的直接后果是","options":["发片表层已定型而内层温度不足","夹板温度被自动调低","药水在发片内层提前氧化","头发毛鳞片被反向压平"],"answer":[0],"explanation":"夹板热量从表层向内传导，发片过厚会使内层达不到定型温度，导致定型不持久；夹板温度不会因发片厚度自动调低，属温度控制机制误判；药水氧化发生在软化阶段而非夹板阶段；毛鳞片被压平是正常定型方向，并非反向。","tier":"进阶"},{"id":262,"type":"single","stem":"冷烫中卷一剂后发卷回弹过快、卷度不持久，最应先检查的操作环节是","options":["卷杠时发片张力与发片厚度","二剂停放时间是否过长","洗发时水温是否过高","烫后是否立即使用护发素"],"answer":[0],"explanation":"一剂后卷度回弹过快通常与卷杠张力不足或发片过厚有关，使药水渗透不均、软化不到位；二剂停放过长会过卷而非回弹过快；洗发水温高影响的是烫后发质而非一剂卷度；烫后护发素不影响一剂定型。","tier":"进阶"},{"id":263,"type":"single","stem":"顾客染发后冲洗时发现发根颜色明显浅于发尾，最可能的原因是","options":["发根温度高使上色快而发尾温度低","发尾涂放时间晚于发根","染膏在发根停留时间短于发尾","发根毛鳞片比发尾更紧闭"],"answer":[0],"explanation":"发根靠近头皮温度高，染膏反应快，若未控制好先后顺序易偏浅；发尾晚涂会偏深而非偏浅；发根停留短会偏深；发根毛鳞片紧闭会阻碍上色使颜色偏浅但题干已说发根浅于发尾，温度因素是首要原因。","tier":"挑战"},{"id":264,"type":"single","stem":"头皮有抓破结痂的顾客要求做漂发，正确的处置是","options":["暂缓漂发并建议结痂愈合后再操作","避开结痂处直接漂其余头发","先涂隔离霜再全头漂发","降低双氧浓度后立即漂发"],"answer":[0],"explanation":"头皮破损时漂粉和双氧易通过创口刺激甚至灼伤，应暂缓操作；避开创口仍可能因冲洗流淌刺激；隔离霜不能完全阻隔化学渗透；降低浓度仍对破损皮肤有刺激风险。","tier":"挑战"},{"id":265,"type":"single","stem":"吹风机配合圆梳做内扣造型时，发尾内扣定型的着力点应落在","options":["发尾中段向发根方向带","发根向发尾方向拉直","发片中部反复提拉","发尾末端向外翻卷"],"answer":[0],"explanation":"内扣需将发尾中段向发根方向带出弧度并冷却定型；向发尾拉直会失去弧度；中部反复提拉影响整体走向；向外翻卷形成外翻而非内扣。","tier":"进阶"},{"id":266,"type":"single","stem":"软化测试中取一小束头发缠绕在手指上松开后回弹缓慢且呈波浪状，说明","options":["软化程度适中可冲水","软化不足需继续等待","软化过度需立即冲水","药水已失效需重涂"],"answer":[0],"explanation":"缠绕后缓慢回弹并呈波浪是软化适中的典型表现；软化不足回弹迅速；软化过度几乎无回弹且易拉断；药水失效则完全无反应。","tier":"进阶"},{"id":267,"type":"single","stem":"顾客漂发后头发呈湿海绵状、拉伸即断，最恰当的下一步是","options":["停止化学操作并做填充式护理","继续漂至目标色再护理","用高温夹板封闭毛鳞片","立即补涂漂粉均匀底色"],"answer":[0],"explanation":"湿海绵状、拉伸即断说明皮质层严重受损，必须停止化学操作并做填充护理；继续漂会彻底断裂；高温夹板加剧损伤；补涂漂粉会进一步破坏。","tier":"挑战"},{"id":268,"type":"single","stem":"调配氧化染膏时，双氧乳浓度从6%换成9%，对染色效果的主要影响是","options":["提浅能力增强且上色更快","提浅能力减弱且颜色更深","只影响上色速度不影响提浅","只影响提浅不影响上色速度"],"answer":[0],"explanation":"双氧浓度升高，氧化能力增强，提浅能力与上色速度同时提高；浓度降低才会提浅减弱；双氧浓度同时影响提浅和上色速度，不是单一影响。","tier":"进阶"},{"id":269,"type":"single","stem":"顾客头皮敏感，洗发时水温应控制在","options":["约37℃接近体温","约45℃略高于体温","约50℃偏热","约30℃偏凉"],"answer":[0],"explanation":"敏感头皮宜用接近体温的温水，约37℃可减少刺激；45℃以上偏热易刺激头皮；50℃更热；30℃偏凉清洁力不足且易引起不适。","tier":"进阶"},{"id":270,"type":"single","stem":"顾客头发湿水后拉伸至原长度1.2倍时断裂，且断裂前无明显回弹，该发质最接近哪种判断","options":["健康发质","轻度受损发质","严重受损发质","油性发质"],"answer":[2],"explanation":"知识点为湿发拉伸测试与发质判断。湿发可拉伸至原长1.2倍以上仍回弹为健康，1.2倍左右断裂且无回弹说明皮质层流失严重，属严重受损；健康发质湿拉伸可超过1.2倍并回弹；轻度受损通常可拉伸至1.2倍左右但仍有部分回弹；油性发质描述的是头皮皮脂分泌状态，与拉伸强度无直接对应。","tier":"进阶"},{"id":271,"type":"single","stem":"给顾客做冷烫时，第一剂作用时间已到但发卷仍不够卷，正确的下一步处置是","options":["直接涂第二剂定型","延长第一剂时间并检查卷度","拆卷后重新上第一剂","用吹风机加热加速定型"],"answer":[1],"explanation":"知识点为冷烫第一剂软化与卷度形成的关系。第一剂是切断二硫键使头发可塑形，卷度不足说明软化未到位，应延长作用时间并观察卷度；直接上第二剂会把未充分软化的形态固定，卷度更差；拆卷后重新上第一剂会破坏已形成的卷形并增加损伤；吹风机加热不能替代第一剂的化学软化作用。","tier":"进阶"},{"id":272,"type":"single","stem":"头皮有抓破的小伤口时，顾客要求做染发，美发师应采取的处置是","options":["照常染发但避开伤口","先做皮肤测试再决定","暂缓染发并建议伤口愈合后再来","改用无氨染膏即可继续"],"answer":[2],"explanation":"知识点为染发禁忌与头皮安全。头皮有破损时染剂中的对苯二胺等成分易经伤口吸收引起过敏或感染，应暂缓；避开伤口仍可能因染剂流动接触破损处；皮肤测试只评估过敏风险，不能解决开放性伤口问题；无氨染膏仍含染料中间体，同样不宜用于破损头皮。","tier":"进阶"},{"id":273,"type":"single","stem":"给顾客做离子烫时，夹板温度设定过高且反复拉同一束头发，最可能造成的后果是","options":["头发变软更服帖","头发出现焦化断裂","卷度更加持久","头皮油脂分泌增多"],"answer":[1],"explanation":"知识点为热工具对头发角蛋白的损伤。夹板温度过高并反复拉同一束会使角蛋白变性、水分急剧蒸发，导致焦化断裂；温度过高不会让头发更服帖而是变脆；离子烫目的是拉直而非形成卷度；头皮油脂分泌与夹板温度无直接因果关系。","tier":"进阶"},{"id":274,"type":"single","stem":"顾客头皮属于油性且伴有较多头屑，做烫发前最应先处理的是","options":["先烫发再处理头屑","先做头皮清洁调理再烫发","直接烫发并缩短第一剂时间","用护发素厚涂头皮后烫发"],"answer":[1],"explanation":"知识点为烫发前头皮状态评估与准备。油性头屑多说明头皮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