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【单选题】
有关 Watson 和 Crick 提出的 DNA 双螺旋结构模型,说法错误的是( )A.
DNA 双链是左手螺旋
B.
维系双螺旋结构的作用力主要是碱基堆积力
C.
碱基对位螺旋链的内侧
D.
组成双螺旋的两条链反向平行
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【简答题】同义句转换。 1. To eat a balanced diet is very important. _____ very important _____ eat a balanced diet. 2. They are watching TV at home now. They are watching TV at home _____. 3. What's wrong with your s...
【单选题】A _____ diet is very important us. [ ]
A.
balance; for
B.
balanced; to
C.
balancing; of
【简答题】Although ______ is very crucial, the efforts that the government promotes a healthy diet have failed.
【简答题】整理一篇关于物候及物候学的综述,2000字左右, 说明其概念特征和常用研究方法、应用和发展现状。物候综述的内容也可以适当发挥 排版及参考文献录入格式见资料库中苏雪的物候综述
【简答题】句型转换 小题1:To eat a balanced diet is very important. (改为同义句) ________ very important________ eat a balanced diet. 小题2:Jack may know the answer to the question . (改为同义句) __________ Jack_______ the answer...
【单选题】Owing to her balanced diet and regular exercise, she is very slim and athletic _____.
A.
in height
B.
in shape
C.
in detail
D.
in sight
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