题目内容

There are two types of language in the world: natural language and artificial language.()

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(A Most Forgiving Ape) The author found the area very disturbing because the equator sun was beating down him mercilessly.()

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There is only one kind of family on planet Earth today: it is the traditional extended

蛋白质的两性电离

A. 280NM
B. 蛋白质分子颗粒大小在1～100NM之间
C. 特定的空间构象被破坏，理化性质丧失
D. 260NM
E. 在一定条件下可解离成带正电荷或负电荷的基团