通信机房内使用的电力电缆，应是（）电缆。
A.普通
B.阻燃
C.特殊
参考答案：B
绝缘台的试验电压为（）kV。
A.20
B.40
C.60
D.110
More and more high-rise buildings have been built in big cities __________ space.
A．in search of
B．in place of
C．for lack of
D．for fear of
