题目内容

DNA在30nm纤丝中压缩多少倍？( )

A. 6倍 B． 10倍 C． 40倍 D． 240倍 E． 1000倍 F． 10000倍

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三、根据以下资料，回答91—95题。
91.2008年工业固体废物综合利用量大约是2004年的()。

A. 1.7倍
B. 2.0倍
C. 2.3倍
D. 2.6倍

Now, listen to the passage.
What do plants do when they are thirsty？
[A] They give out faint cries.
[B] They make noises to drive away insects.
[C] They extend their water pipes.
[D] They become elastic like rubber bands.

一段长度100bp的DNA，具有4¹⁰⁰。种可能的序列组合形式。

A] measurement
[B] calculation
[C] guarantee
[D] optimism