According to the passage, body temperature

A． plays a vital role in selecting people for alternative day and night shifts

B． changes every two hours during the day and every three hours during the night

C． has been used for industries in selecting people for alternative shifts

D． changes after a person has finished the training for alternative shifts

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参考答案

答案解析

定位：根据题干信息词body temperature定位到第五段倒数第二句。
解析：本句指出： “因此，通过在清醒时期每隔两小时测量一次体温，．可以看出一个人能多快适应颠倒的作息时间，而这可以作为挑选的基础。”因此体温对挑选倒班的人选很重要，故A项为正确答案：C项与文意相悖；B项和D项原文均未提及。

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