Strict measures ________to keep them away form. fire

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[单选题]Strict measures ________to keep them away form. fire

A. should be taken
B. should take
C. be taken
D. should been taken

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[单选题]水的导热速度很快，通常比空气导热快：

A. 6倍
B. 16倍
C. 26倍
D. 8倍

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