affirmatively chosen item必: certainly; necessarily; sure ...必选: required必选法: forced choice technique; forcedchoice techniquee必选式问卷必选式问卷: forced choice questionnaire必选或可选的: mandatory or optional下载手机词典可随时随地查词查翻译关注微信公众号:chachacidian,回复:必选项,即可在微信中查询翻译