单项选择题

切削液的作用，不包括（）
A、提高切削速度
B、冷却
C、润滑
D、清洗

你可能感兴趣的试题

单项选择题

Contrastive analysis is an approach to analysis of second language acquisition, based on a belief that a more effective teaching pedagogy would come out when the similarities and differences between native language and target language are taken into consideration.
A、正确
B、错误

不定项选择

现代人生活节奏快，有时食欲不好不会影响健康。

A．错误
B．正确