车削加工可以用于加工()等。
A.外圆
B.中心孔
C.螺纹
D.V形槽
参考答案:A, B, C
绝缘手套有橡胶制品和乳胶制品两类,分12kV和7kV两种。
It is too early to tell whether ________ the public expenses will benefit the company workers or not.
[ ]
A. cutting down
B. cutting up
C. cutting off
D. cutting away