—The project has been held up by a sudde

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问题选择题

—The project has been held up by a sudden change in temperature for a week.

—I'm afraid the terrible weather will________for some time.[ ]

A. keep back

B. keep up

C. keep out

D. keep on

答案

答案：B

选择题

( ) 1. A. I'm going to visit England. B. I'm going to visit America. C. I'm going to visit Canada.
( )2. A. He went to the police station. B. He went to the hospital. C. He went to the supermarket.
( )3. A. We often play volleyball on weekends. B. We often play baseball on weekends. C. It's good to exercise
( )4. A. It's raining. We wear our raincoats. B. It's snowing. We can make a snowman. C. It's a sunny day. We are very happy.
( )5. A. I want to see a doctor. B. I want to see a film. C. I want to see flowers and walk my dog.

问答题简答题

为什么要对二次供水设施的水池、水箱等储水设施进行清洗、消毒？清洗消毒要求有哪些？