When a psychologist does a general experiment about the human mind, he selects p

游客2023-11-21 47

问题 When a psychologist does a general experiment about the human mind, he selects people ______ and asks them questions.

选项 A、at length
B、at random
C、in essence
D、in bulk

答案 B

解析 at random随意地，随机地。

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