变压器短路损耗大致上与电流的平方成（）
A.正比
B.反比
C.无关
参考答案：A
In order to make our city green，______.
A．it is necessary to have planted more trees
B．many more trees need to plant
C．our city needs more trees
D．we must plant more trees
找出错误并改正。
( ) 1. Danny and Jenny go to a walk. _____________
A B C
( ) 2. There are many people at the street. _____________
( ) 3. The buses go slow. _____________
