The recent study of______has produced some interesting results showing that huma

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问题 The recent study of______has produced some interesting results showing that humans have a built-in 24-hour biological clock.

选项 A、biographs
B、biorhythms
C、bioscopes
D、biotypes

答案 B

解析句意：最近关于生物节律的研究得出一个十分有趣的结果，即人体有着内在的24小时生物钟。biorhythm生物节律。biograph生物运动描记器。bioscope放映机。biotype同型小种，生物型。

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