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    精英家教网 > 高中英语 > 题目详情
    Old-fashioned phones matter when wireless networks _____ in disasters.
    A．turn downB．break downC．turn outD．break out
    B

    试题分析：句意为：在灾难中当无线网络发生故障时，老式的电话就很重要了。turn down减小，关小，拒绝；break down 发生故障，身体跨了；turn out 结果是，证明是；break out 爆发。故答案为B。
    考点: 考查动词短语的用法。
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