根据网考网考试中心的统计分析,以下试题在2018/6/25日专升本考试习题练习中,答错率较高,为:91%
【单选题】 According to the theory of photoperiodism, ______. ( )
A.birds should migrate in the middle of the winter
B.longer days cause changes in the bodies of birds
C.seasonal changes in the length of days do not affect migration
D.increasing daylight increases the distance of migration
网考网参考答案:B,答错率:91%
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