句型拓展。

1.I'm visiting my grandmother next week. （提问划线部分）

_______ _________you ______this weekend?

2.Today is very hot. （提问划线部分）

                                           the weather _______ today?

3.We work for 8 hours a day. （提问划线部分）

_________ ______ _________ you ______a day?

4.They are going to Hong Kong for vacation. （提问划线部分）

________ _______they going for vacation?

5.He often goes to the movis on weekends.

_______ _________he ______on vacation?

一般设柴油发电机作为全厂失电后的电源系统是（）。

A.保安系统；

B.直流系统；

C.交流系统；

D.保护系统。