题目内容

Questions22to25arebasedonthepassageyouhavejustheard.

A)Arareanimal.
B)Ahistoricalsite.
C)Acowbone.
D)Apreciousstone.

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A)Datingit.
B)Preservingit.
C)Measuringit.
D)Identifyingit.

A)Thechannelneedstointerviewtheboy.
B)Theboyshouldhavecalledanexpert.
C)Theboy'sfamilyhadactedcorrectly.
D)Thesiteshouldhavebeenprotected.

A)Conductamoredetailedsearch.
B)AsktheuniversitytorewardJude.
C)Searchforsimilarfossilselsewhere.
D)Seekadditionalfundsforthesearch.

A. 都有生物活性
B. 天然蛋白质均有三级结构
C. 主要是次级键维系稳定
D. 亲水基团多聚集在表面
E. 氨基酸残基决定肽链盘曲折叠