题目内容

遗传学发展史上的大事记有，，__等。

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Now little has been done to
[A] decide a student's job
[B] test a student's ability .
[C] test a student's knowledge
[D] test a student's memory

试分析细菌的遗传重组方式有哪些？它与高等生物的遗传重组方式有何异同？

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[ A] The House of Representatives did not agree with the Senate.
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以下四个选项中，能折叠成左边的图形的是（）。