题目内容：
在凸轮机构中，当从动件按等加速等减速运动规律运动时，机构将（）。
A.产生刚性冲击
B.产生柔性冲击
C.既有刚性冲击又有柔性冲击
D.既无刚性冲击又无柔性冲击
参考答案：
选择题：在凸轮机构中，当从动件按等加速等减速运动规律运动时，机构将（）。
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