— I'm afraid they may not agree with you.

— I don't care whatever they'll say. I've made my decision and I'm going to____ it. [      ]

A. carry out      

B. keep up      

C. insist on      

D. stick to

对于偏置直动凸轮，应将百分表测头放在（）进行测量。检测时，可同时测出凸轮曲线所占中心角和升高量H，通过计算得出凸轮的实际导程值。

A.偏距为e处的位置上

B.中心

C.某一基准部位

D.靠近工件外圆处