使用高速钢刀具切削加工,粗加工时选择()作为切削液。
A.切削油
B.乳化液
C.水溶液
D.煤油
E.柴油
D.机油
参考答案:B, C
The premier said the nation’s development should not only promote economic growth , but also pursue social fairness and justice to every individual’s all-round development in a free environment.
A.urge
B.insure
C.ensure
D.satisfy
总PLC的监控范围?