皮皮学，免费搜题
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【单选题】
蛋白质合成的场所是A.
B.
核糖体
C.
线粒体
D.
中介体
E.
极体
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举一反三
【简答题】建筑石膏的初凝时间应不小于______min，终凝时间不迟于______min
【简答题】熟石膏的初凝时间为 终凝时间为 。
【单选题】You are supposed to read your article carefully and get it polished _____ you submit it. [ ]
A.
until
B.
when
C.
before
D.
after
【多选题】In the second step to pilot your questionnaire,you submit it to your adviser for scrutiny on:
A.
whether there are grammatical and spelling mistakes
B.
whether the questions in the questionnaire address your overarching research question
C.
whether any important aspects of your research questions are left unaddressed
D.
whether there are mistakes in the way individual questions are formulated
E.
whether the language you use is clear and natural to the respondents
【简答题】在对散客送站服务中，导游人员与游客之间确认送站时间和地点的工作必须在送站前_____小时进行。
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