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【判断题】
腺嘌呤和鸟嘌呤脱去氨基后，分别生成次黄嘌呤和黄嘌呤。A.
正确
B.
错误
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【简答题】Text 2 Life learning( sometimes called un-schooling or self-directed learning)is one of those concepts that are almost easier to explain by saying what it isn't, than what it is. And that's probably b...
【单选题】Paragraph 2__________
A.
Ways to Learn a Language Successfully
B.
Learning a language Purposefully
C.
Learning a Language Actively
D.
Learning a Language Independently
E.
Learning from Mistakes
F.
Learning to Think in the Target Language
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