对乙醇、甲醇、丙酮、醋酸乙酯等分子极性较强的可燃液体,应采用的灭火剂是()。
A.普通蛋白泡沫灭火剂
B.抗溶性泡沫灭火剂
C.水成膜泡沫灭火剂
D.氟蛋白泡沫灭火剂
参考答案:B
— How long has the nationwide ban (禁止) on plastic bags been put into practice?
— the beginning of June. [ ]
A. Behind
B. Since
C. For
D. At
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