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废水调节池内的混合措施有哪几种？

答案

参考答案：水泵强制循环、空气循环、机械搅拌、穿孔导流槽引水。

问答题 简答题

缝纫机线夹太紧对生产有何影响？如何调整？
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填空题
选用方框内所给词的适当形式填空。
you   cross   act   child    laugh
1. The boy wants to be an ________ just like Jackie Chan.                      
2. Tony, believe ________ and you are sure to succeed.                         
3. We couldn't help ________ after we watched Zhao Benshan's funny performance.
4. You are supposed to look around when you walk ________ the street.          
5. Chocolate is usually the ________ favorite food.                            
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