题目内容

高副两元素之间相对运动有滚动和滑动时,其瞬心就在两元素的接触处。

A. 对
B. 错

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平面四杆机构的传动角在机构运动过程中是时刻变化的,为保证机构的动力性能,应限制其最小值γ不小于某一许用值[γ]。

A. 对
B. 错

在偏置曲柄滑块机构中,若以曲柄为原动件时,最小传动角γmin可能出现在曲柄与机架(即滑块的导 路)相平行的位置。

A. 对
B. 错

Generally, is used to show the relationship between knowledge points of teaching units.

A. user interface
B. hyperlink structure
C. courseware
D. document

Multimedia can only play the most important role in teaching. The greater the amount of information, the more teachers need to be able to accurately extract useful information for classes.

A. 对
B. 错

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