Responsibility is one of the top qualities parents want their children to have when they _______.  

A．bring up

B．grow up

C．look up

D．pick up

测量圆柱工件长度，其公差在±0.05，最常用的量具为（）。

A.钢板尺

B.千分尺

C.游标卡尺

D.钢卷尺