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肌肉收缩滑行学说的直接证据是肌肉收缩时

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肌肉收缩滑行学说的直接证据是肌肉收缩时

A.肌小节长度缩短

B.暗带长度不变，明带和H带缩短

C.暗带长度缩短，明带和H带不变

D.相邻的Z线相互靠近

参考答案:

答案：暗带长度不变，明带和H带缩短

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