_________（47）A.For an adult time goes fast year b
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_________（47）
A.For an adult,time goes fast year by year.
B.It controls,for example,the flapping of birds’ wings,the beating of the heart and the rising and setting of the sun.
C.The larger the animal is,the longer its life span is and the slower its life tempo is.
D.The tide goes out when the moon moves away and its attraction is weaker.
E.We always tend to think all the animals have the same sense of time as human beings.
F.The second spring tide takes them back to the sea.
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答案：D
本空前文提到：月亮对大海施加力量和影响，其地心吸力造成涨潮。空后的句子涉及第二次涨潮。可以推断，位于这两个句子之间的所要填的内容应该与大海和潮汐有关。选项D说的是退潮。所以选项D是正确答案。