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【单选题】

某轮航行中第一货舱内泡沫聚苯乙烯着火,首先应采取的灭火战术是。

A.
间接灭火
B.
防护周围
C.
直接扑灭
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参考答案:
举一反三

【单选题】Desperately short of living space and dangerously prone to flooding, the Netherlands plans to start building homes, businesses and even roads on water. With nearly a third of the country already cover...

A.
most parts of the country are covered by water
B.
the country is constantly threatened by floods
C.
it will promote the cultivation of flowers
D.
people think it better to live on water

【单选题】四元轴烯t、苯乙烯b及立方烷c的分子式均为C 8 H 8 。下列说法正确的是( )

A.
b的同分异构体只有t和c两种
B.
t、b、c的二氯代物均只有三种
C.
t、b、c中只有t的所有原子处于同一平面
D.
t、b、c中只有t和b能使酸性KMnO4溶液褪色
相关题目:
【单选题】Desperately short of living space and dangerously prone to flooding, the Netherlands plans to start building homes, businesses and even roads on water. With nearly a third of the country already cover...
A.
most parts of the country are covered by water
B.
the country is constantly threatened by floods
C.
it will promote the cultivation of flowers
D.
people think it better to live on water
【单选题】四元轴烯t、苯乙烯b及立方烷c的分子式均为C 8 H 8 。下列说法正确的是( )
A.
b的同分异构体只有t和c两种
B.
t、b、c的二氯代物均只有三种
C.
t、b、c中只有t的所有原子处于同一平面
D.
t、b、c中只有t和b能使酸性KMnO4溶液褪色
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