The result of the experiments is reliable and persuasive as all the participants are chosen__________.

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问题 The result of the experiments is reliable and persuasive as all the participants are chosen__________.

选项 A、at random
B、at length
C、to excess
D、on average

答案A

解析实验的结果是令人信服的，而且是可靠的，因为实验的参与者是任选的。at random“随便，随意；随机(抽样)”； at length“详细地，彻底地”；to excess“过度地”；on average“平均而言”。

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大学英语六级

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