题目内容

从动件从距离凸轮回转中心最近位置到距离凸轮回转中心最远位置的过程称为()。

A.推程
B.回程
C.运动
D.转动

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等速运动规律适合于()的场合。

A.高速高载
B.中速中载
C.低速低载
D. 都可以

凸轮从动件作等速运动时,在行程始末有________性冲击。

Translate the paragraph below into Chinese.Anti-materialists tend to deride the importance of “things”. Yet things are highly significant, not merely because of their functional utility, but also because of their psychological impact. We develop relationships with things. Things affect our sense of continuity or discontinuity. They play a role in the structure of situations and the foreshortening of our relationships with things accelerates the pace of life.

朱砂具有下面的功效是( )

A. 清热泻火
B. 安神解毒
C. 润肠通便
D. 敛肺止咳