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【单选题】
有钢铝两根圆截面轴,其尺寸大小都相同。已知 G钢=3G铝,当受扭情况相同时,( )A.
钢轴的最大剪应力和扭转角都小于铝轴的
B.
钢轴的最大剪应力和扭转角都等于铝轴的
C.
两轴的最大剪应力相等，而钢轴的扭转角大于铝轴的
D.
两轴的最大剪应力相等，而钢轴的扭转角小于铝轴的
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