切削用量包括背吃刀具，进给量和工件转速.
参考答案：错
－ Hello, Sunshine Bookstore. This is Jeff speaking. Can I help you?
－ Yes, please. I want to ______ some storybooks for my daughter.
A．write
B．borrow
C．print
D．order
选煤厂常用的产品脱水方法有（）
A、重力脱水
B、离心脱水
C、过滤脱水
D、压滤脱水
