Once a computer is put into water, the system _______ and cannot repair itself.
A．breaks downB．breaks throughC．breaks outD．breaks up
A
考察break的詞組。Break down 分解，瓦解 ，崩潰 break through 突破 break out 爆發(fā) break up 打碎，結(jié)束
句意為，一旦一個(gè)電腦被放入水中，系統(tǒng)就會(huì)崩潰，無(wú)法修復(fù)
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