倒顺开关正反转控制线路一般用于控制功率在（）kW以下的小容量电机
A.3
B.7.5
C.30
D.15
参考答案：A
It is said that Columbus was the first one who ______ America.[ ]
A. found
B. discovered
C. found out
D. looked for
I’m for that he’ll stay here.
A．one
B．it
C．all
D．what
