直动从动件盘形凸轮机构中,当推程为等速运动规律时,最大压力角发生在行程()。
A.起点;
B.中点;
C.终点
参考答案:A
________ his pale face,we all suggested ________ to see the doctor right away.
A.Seeing;he going
B.Having seen;him go
C.Seeing;his going
D.Seen;him going