当可燃气体、蒸气在空气中的浓度低于爆炸下限时,遇到明火既不会燃烧,也不会爆炸;高于爆炸上限时,遇到明火()。
A. 既燃烧又爆炸
B. 只燃烧不爆炸
C. 只爆炸不燃烧
D. 不燃烧不爆炸
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Accumulations of oily rags should be().
A. kept in nonmetal containers
B. discarded as soon as possible
C. cleaned thoroughly for reuse
D. kept in the paint locker