一个高中英语单选题

A

break down=go wrong
break out是(战争)爆发
break up:
vt. 开垦(破碎,破坏,解散,结束,衰弱)
break in=闯入..

A 当他正在网上搜索信息时，计算机系统突然瘫痪。
break down
(of a machine or vehicle) to stop working because of a fault:
The telephone system has broken down.

break out
(of war, fighting or other unpleasant events) to start suddenly:
They had escaped to America shortly before war broke out in 1939.

break up
1to separate into smaller pieces:
The ship broke up on the rocks.
2to come to an end:
Their marriage has broken up.
3to go away in different directions:
The meeting broke up at eleven o’clock.
4(especially BrE) to begin the holidays when school closes at the end of a term:
When do you break up for Christmas?
5(BrE) to become very weak:
He was breaking up under the strain.
6(NAmE) to laugh very hard:
Woody Allen makes me just break up.
7when a person who is talking on a mobile phone / cellphone breaks up, you can no longer hear them clearly because the signal has been interrupted

break in
to enter a building by force:
Burglars had broken in while we were away.
够详细吧~

A

break down抛锚或者出故障
break out 疾病或者战争爆发
break up 关系中止，停止
break in 闯入（房间）

A.崩溃
B.爆发
c。破裂
D。闯入

所以应选A

当他在网上搜索信息时电脑系统出故障
选A

B为爆炸
C为结束
D为打断

选A。BROKE DOWN意思为临时故障。
当他正在网上搜索信息是，电脑突然故障了。