请问拦污栅维修方法叙述错误的是（）。A、机械清污是用齿耙扒掉

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问题多项选择题

请问拦污栅维修方法叙述错误的是（）。

A、机械清污是用齿耙扒掉拦污栅上的污物

B、拦污栅吊起清污方法也可以结合拦污栅检修进行

C、污物较多、清污困难的情况可设两道拦污栅

D、小型水工建筑物常用清污机

答案

参考答案：A, D

填空题

用方框内所给词或短语的适当形式填空

1. He _______ thinking that she wouldn't come after all.

2. What program is on _______ 2?

3. We've been having _______ weather recently.

4. There are _______ 2,000 students in the cinema.

5. The _______ of this music is exciting.

6. We're going away _______ .

7. She likes the country, _______ in spring.

问答题简答题

旅客列车在中间站发生变更到发线时应急处置预案。