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【单选题】
下列物质不属于有机化合物的是 [ ]A.
蛋白质
B.
丁烷气
C.
碳酸钠
D.
蔗糖
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【单选题】One of the most important periods in Greek history was the Hellenistic Age which began after the death of Alexander the Great in 323 B. C. , and lasted almost 200 years. It was during this time in his...
A.
when
B.
that
C.
which
D.
in which
【单选题】A: ( ) will the meal take? B:It'll take two hours, I think.
A.
How long
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【单选题】小鼠的海拉细胞有氯霉素抗性,通过显微操作,把无氯霉素抗性的小鼠体细胞的核取出,注入去核的小鼠海拉细胞中,然后将这一杂交细胞培养在含有氯霉素的培养基中,结果发现,杂交细胞持续分裂。这说明,氯霉素抗性基因最可能在( ) DNA分子上。
A.
染色体
B.
线粒体
C.
核糖体
D.
叶绿体
【简答题】1) “To bring inspiration and innovation to every athlete in the world. If you have a body, you are an athlete.”(From Nike company) 2) It is impossible for anyone to advance within IKEA without wholly ...
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【单选题】A: ( ) will the meal take? B:It'll take two hours, I think.
A.
How long
B.
How many
C.
How much
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