________ by his friend for his mistake, Jim felt very unhapp

________ by his friend for his mistake, Jim felt very unhappy.A.Criticizing B.To

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If I had remembered ________the window, the thief would not

If I had remembered ________the window, the thief would not have got in.A.to clo

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The government cannot operate effectively________it is free

The government cannot operate effectively________it is free from such interferen

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扑救C类火灾不应选用(  )型灭火器。

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对于100m及以下建筑而言,消防应急照明和疏散指示系统的蓄电池的初始放电时间不小于(  )min。

对于100m及以下建筑而言,消防应急照明和疏散指示系统的蓄电池的初始放电时间不小于(  )min。A.30 B.60 C.90 D.180

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