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conservative means being opposed to great or sudden change.()

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According to one rock music critic, the teenagers express their rebellious attitudes

The smallest meaningful unit of language is called a morph.()

分光光度法的吸光度与什么无关

A. 人射光的波长
B. 液层的高度
C. 液层的厚度
D. 溶液的浓度
E. 电压

蛋白质一级结构的化学键主要是

A. 共价键
B. 盐键
C. 氢键
D. 肽键
E. 疏水键