选择题:铰链四杆机构中,若最短杆和最长杆长度之和大于其他两杆长度之和,则机构中()。

题目内容:

铰链四杆机构中,若最短杆和最长杆长度之和大于其他两杆长度之和,则机构中()。

A.—定有曲柄存在

B.一定无曲柄存在

C.一定无摇杆存在

D.是否有曲柄存在还要看机架是哪一个构件

参考答案:

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