在特别潮湿或周围均为金属导体的地方工作时,行灯的电压不准超过()V。
A.36
B.24
C.12
D.6
参考答案:B
The boy _______ Ling Feng in the school is really _______ unusual student.
A.called; a
B.calling; a
C.called; an
D.calling; an
潜油电机的转子是分节的。