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【简答题】

写出合成下列聚合物的原料(单体)名称及聚合物的结构式: 1 、 聚氯乙烯 2 、聚甲基硅氧烷(硅橡胶) 3 、聚异丁烯 4、 聚甲醛 5 、聚乙烯醇 6 、聚环氧丙烷 7 、聚氯丁二烯 8 、聚丙烯酸甲酯 9 、 ABS 树脂 10 、尼龙6 11 、聚苯乙烯 12 、天然橡胶

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【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