(单选题)60: 某DNA分子胸腺嘧啶的摩尔含量为20%，则胞嘧啶的摩尔含量应为( )
A: 0.2
B: 0.3
C: 0.4
D: 0.6
E: 0.8
1.(匹配题)SectionINewwordsI.Matcheachvocabularywordontheleftwiththecorrectdefini...
1.(text)I.ReadingComprehension(5points) Readthefivemain-ideaquestionsthatfollowa...
1.(完形填空题)1．ListentotheconversationanddecidewhetherthefollowingisTrue(T)orF...
1.(完形填空题)1．ListentotheconversationanddecidewhetherthefollowingisT(true)orF...
1.(完形填空题)1．ListentotheconversationanddecidewhetherthefollowingisTrue(T)orF...
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