Once a computer is put into water, the s...

Once a computer is put into water, the system _______ and cannot repair itself.

A．breaks down

B．breaks through

C．breaks out

D．breaks up

A 【解析】考察break的词组。Break down 分解，瓦解，崩溃 break through 突破 break out 爆发 break up 打碎，结束句意为，一旦一个电脑被放入水中，系统就会崩溃，无法修复

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