车床尾座,中滑板手柄转动的轴承处用()润滑。
A.浇油
B.油绳导油
C.黄油杯
D.弹子油杯注油
参考答案:D
Singe women usually stay away from marriage by their own choice, ______ single men are mostly
victims of circumstances. [ ]
A. for
B. while
C. and
D. but
建立与完善()、()等高频通道加工设备的定期检修制度,落实责任制,消除检修、管理的死区。