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【简答题】

聚丙烯、聚酰胺、聚碳酸酯、聚苯乙烯塑料注塑需要主要哪些问题。

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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