单项选择题

Research should continue on controlled nuclear fusion, but no energy program should be premised on its existence until it has proved practical.

A．focused
B．concentrated
C．agreed
D．based
<上一题 目录 下一题>
热门 试题

单项选择题
Lincoln, former president of the United States, is a conspicuous example of a poor boy who succeeded.
A．sturdy
B．obstinate
C．permanent
D．manifest
单项选择题
In his opinion, the objection to barbarity does not mean that capital punishment should not go on.
A．adversity
B．savagery
C．habitat
D．integrity
相关试题