When you are going to put out a fire you_________
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A.must be careful
B.should keep air away from it
C.must know it is dangerous
D.should cover it with water
请帮忙给出正确答案和分析,谢谢!
参考解答
正确答案:B
事实细节题。根据文章第三段的第九、十、十一句,氧气是助燃的,灭火要隔绝空气中的氧气,所以选B。
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