《符合证明》的有效性服从于由主管机关认可的机构执行()。
A.初次审核
B.年度审核
C.中间审核
D.换证审核
参考答案:B
—Smoking and drunkenness(酗酒) are both bad for people’s health.
—Yes. So we should ______ cigarettes and alcohol. [ ]
A. shut down
B. get on with
C. stay away from
D. put away
压铸模中镶块的型腔表面粗糙度主应控制为()
A.小于0.4μm
B.1.6μm左右
C.0.8~1.6μm
D.大于1.6μm