答案：D
What kind of people moved to the suburbs
A．Middle-class people.
B．The rich.
C．The poor.
D．The young.
电缆敷设前应核对（）等级、型号、截面积是否符要求、并检查其表面有无损伤。
A.电流
B.电压
C.功率
D.绝缘
