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【简答题】

在严格纯化后并有氮气保护的聚合瓶中加入50mL环己烷、5g苯乙烯、1.5mL四氢呋喃。现需制备相对分子质量为1万的聚苯乙烯,应加入浓度为0.25mol·L-1的正丁基锂溶液多少毫升?并说明为什么要加入四氢呋喃。

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【单选题】Desperately short of living space and erously 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
相关题目:
【单选题】Desperately short of living space and erously 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