电收尘器电场有效断面风速应控制在0.5-0.6米/秒；电场风速不宜过

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问题判断题

电收尘器电场有效断面风速应控制在0.5-0.6米/秒；电场风速不宜过大，风速过大，漏风增多，氧含量增高，易引起爆炸。（）

答案

参考答案：错

解析：正确答案：0.7-1.0米/秒。

填空题

用所给词适当形式填空：

1. The men in _______ (制服) came up to them

2. When you come to the ________ (拐角), turn right.

3. He ran ________ (朝，向) the car that was moving.

4. Are you ________ (惊讶的) to see the animals?

5. My mother was ill yesterday and she felt very ________ (虚弱的).

6. Can you swim ________ (cross) the river.

7. The problem is very easy. They can work it out ________ (easy).

8. He went to school without ________ (have) breakfast.

9. They ________ (plan) to take another route when they saw the robbers.

10. We'll learn the ________ (twelve) lesson tomorrow.

问答题简答题

解释倒U假说理论。