活性污泥挂膜法
参考答案：
用活性污泥作为菌种附着在滤料上，以废水中的有机物为营养生长繁殖，使之形成生物膜的方法。
完成对话。
A: Hello, Li Lei 1 are you going?
B: I'm going to the 2 . We're going to help the farmers there.
Would you like to 3 with me?
A: Certainly.
B: OK. 4 go.
A: What are you going to 5 there?
B: We're going to 6 apples.
A: Good.I'd like to do that.
B: Look, the students are 7 there.They're 8 apples.
A: Let's help 9 .
B: 10 right.
1.________ 2.__________ 3.___________ 4._________ 5.__________
6.________ 7.__________ 8.___________ 9._________ 10._________
内外账务核对要坚持（）的原则，采取换人核对方式进行。
A.连续性
B.及时性
C.时效性
D.制约性
