Professor James used student volunteers as ______ for his experiment.

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问题 Professor James used student volunteers as ______ for his experiment.

选项 A、models
B、cases
C、agents
D、subjects

答案D

解析此题考查名词词义。关键词为题干中的experiment，与此相关的应是D项subjects“受试对象”，而不会是A项的models“模特”、B项的cases“事例；病例；条例”或C项的agents“代理人”。

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专业英语四级

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Professor James used student volunteers as ______ for his experiment.

专业英语四级

A、Searchingforinformation.B、Doingaliteraryresearch.C、Doingquestionnairesurvey.D、Narrowingdownthetopic.D细节题。选项A是查询资

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PassageThreeWhydidmoreandmorecollegestudentsreportanxietyanddepressionaccordingtoMr.SchwartzatSwarthmore?

Thedestructionofournaturalresourcesandcontaminationofourfoodsupplycontinuetooccur,largelybecauseoftheextreme

Asmanyas40%ofuniversitylanguagedepartmentsarelikelytoclosewithinadecade,theformergovernmentadviserchargedwi

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【2015-45】某班一组学生在一次数学测验中的成绩是：72，80，56，87，61，94，76，92。这组数据的中位数是()。

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薄荷的功效有（　　）。