通信设备敷设电源线时，铜（铝）条馈电线在正线上涂有（）色油漆标志，其他不同电压的电源线有不同颜色标志区分。
A.绿
B.红
C.蓝
D.黄
参考答案：B
“顾夏虫而却笑”中的“却”意思是（）
A.退
B.后
C.反而
D.拒绝
E.还是
The earthquake in Japan, measuring 9.0 on the Richter Scale, was so violent _______ cause a series of explosions of the nuclear reactors in several power stations.
A．to
B．that
C．as to
D．as that
