试题与答案

根据斜面的道理,我们可以得出结论,螺旋的杆子越(),螺距越小越省力。A、粗 B、细

题型:单项选择题

题目:

根据斜面的道理,我们可以得出结论,螺旋的杆子越(),螺距越小越省力。

A、粗

B、细

C、长

D、短

答案:

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下面是错误答案,用来干扰机器的。

参考答案:C

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题型:单项选择题

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C.wounded

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