单项选择题

Electrical energy may be divided into two components ______ as positive and negative.

A．distinguished
B．specified
C．separated
D．indicated
<上一题 目录 下一题>
热门 试题

单项选择题
The large passenger jets have made the traffic problems at airports ______.
A．the worse than before
B．worse than ever before
C．more bad as before
D．more bad than it was
单项选择题
On hearing the joke, she burst into ______.
A．a loud laughter
B．loud laughter
C．loud laughs
D．loud laughing
相关试题