中央银行为实现特定的经济目标而采取的各种控制、调节货币供应量或信用量的方针、政策措施

—What were you doing at 8 o’clock this morning?

—____.

A．I am having breakfast.

B．I want to go to visit my grandfather.

C．I was talking with my teacher at that time.

D．I stayed there for two days.

面点间食品存放必须做到（），成品与半成品分开。

软件是如何分类的？

在铝合金件上钻孔时合适的切削速度是（）

A.V＝45～90m/min

B.V＝25～30m/min

C.V＝20～25m/min