–I think students should have mobile phones to call their parents.

- _____. They often use them to play games instead.

A．I hope so

B．I don’t agree

C．No problem

D．Good idea

工艺基准指的是（）。

A、定位基准

B、粗基准

C、设计基准

D、测量基准

E、安装基准

F、精基准