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液晶分子具有什么结构特征高分子液晶根据制备方法可分为哪些类型根据结构又可分为哪几种类型高分子液晶有哪些应用

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The objective of this popular consultation is to determine,______, the final political status of the region, whether to remain of the country as a special district, or to part from it.(浙江大学2010年试题)

A. once upon a time
B. once and again
C. all at once
D. once and for all

As skies fill with millions of migrating birds, European scientists say the seasonal miracle appears to depend on a seeming______: The fatter the bird, the more efficiently it flies.(浙江大学2010年试题)

A. interruption
B. description
C. qualification
D. contradiction

为何对聚对苯二甲酸乙二醇酯进行淬火处理时得到透明材料，而对等规聚甲基丙烯酸甲酯进行同样处理时试样是不透明的

The first few months of the year I had dreaded the ringing of the telephone, because I knew it meant another______decision to be made.(上海交通大学2008年试题)

A. critical
B. plentiful
C. decent
D. massive