关于目的基因获取过程的叙述中,不正确的是( ) A .人工合成法可合成未知序列的任意大小的 DNA 片段 B .与原核生物的目的基因均可从基因文库中提取 C .原核生物的目的基因一般不从 cDNA 文库中提取 D .若可设计出特定引物, PCR 方法也可获取目的基因
A.
B.
C.
D.
D
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【简答题】There are 70,000 pubs in England and Wales have several thousand more in Scotland. Every country has its drinking shop, but none has an institution quite like the British pub. The most important featu...
【简答题】阅读理解。 There are 70,000 pubs in England and Wales have several thousand more in Scotland. Every country has its drinking shop, but none has an institution quite like the British pub. The most important...