简述回收水泵的作用。
参考答案：
（1）回收水泵的作用就是用于把回收水池中的污水和污油及时排放到储油罐内；
（2）使污水、污油在除油罐内再次进行油水分离。
( )不属于工程技术方面的风险因素。
A．自然条件
B．分包
C．技术规范
D．工程变更
用所给词的正确形式填空。
(in the box, found, an, it's, be, you, how, excuse, please, call, key )
1. Is that ______ watch?
2. What ______ your telephone number?
3. Is that your book in the lost and ______ case?
4. Please ______ Gina at 236-5698.
5. —What's this?
—______ a pencil case.
6. I lost a set of ______.
7. He has (有) ______ English book.
8. ______ do you spell "pen"?
9. ______ me! Is this your watch?
10. What's your name, ______?
