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实心圆轴受扭，若将轴的直径减小一半时，则圆轴的单位长度扭转角是原来的。

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实心圆轴受扭，若将轴的直径减小一半时，则圆轴的单位长度扭转角是原来的。

A.2倍;

B.4倍;

C.8倍;

D.16倍。

参考答案:

答案：D

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