【GMAT考满分语法SC题库】Participants in a double-blind study of the effect_真题_答案_解析 GMAT考满分官网

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题目内容

Participants in a double-blind study of the effectiveness of experimental drugs will be divided into two groups, one which will receive only placebo medication.

Aone which 分析该选项
Bone of which 分析该选项
Cand one of which 分析该选项
Done of whom 分析该选项
Eone of them 分析该选项

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正确答案: B

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