皮皮学，免费搜题
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【单选题】
关于受精哪项正确 ( )A.
卵子在输卵管峡部受精
B.
精子与卵子相遇时发生顶体反应
C.
精子获能的部位是阴道
D.
精子与卵子相遇受精开始
E.
受精的部位在伞部
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A.
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B.
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