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【判断题】
根据磷肥使用效果分为水溶性磷肥、弱酸溶性磷肥、难溶性磷肥。A.
正确
B.
错误
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【简答题】超声波传感器由哪几部分构成?
【简答题】Have you know Paula _____ last summer?
【单选题】Peter Paul
A.
Overfishing results from extensive use of new technologies．
B.
Many people in my place support stricter regulation on fishing．
C.
I think that you failed to point out the real reason for overfishing．
D.
We are in a very weak position to compete with other countdes in fishing．
E.
Sooner or later，we will feel regretful about out current fishing practice．
F.
I didn’t know there were such damaging ways of fishing around the world．
G.
I wonder if those fishermen have ever considered the consequences of exhausting ocean resources．