对易燃、易爆介质的压力容器和管道,更换法兰密封垫时可以使用黑金属工具进行更换。()

The author's attitude towards the government is ______.

A．hopeful

B．disappointed

C．sarcastic

D．bitter

The author has suggested the following solutions to the housing crisis, EXCEPT ______.

A．involving grassroots

B．back to campus

C．improving transportation

D．governmental efforts

Why do Americans hurry at meals?

A．They are very busy.

B．They want to eat dinner slowly.

C．They don't like to eat.

What is suggested in the passage?

A．Americans do not have a short sleep in the afternoon.

B．Americans like eating with friends.

C．Americans don't eat much on weekends.