题目内容

以下哪些因素会直接影响到你对生物菌剂的选取、剂量的投放和投放方式的选

A. 受污染水体的水温
B. 受污染水体的pH值
C. 污染物种类和污染程度
D. 水体体积

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Be careful!

Time is money.

Let us go,_________?

A. shall we
B. will you
C. you know
D. why not

Hurry up or _____________________.

A. you can get there on time
B. you will miss the train
C. you can catch the bus
D. you will catch the plane

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