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【多选题】
以下有关RT-PCR反应的说法你认为正确的有( )A.
反应体系一般有20μl
B.
反应体系中有缓冲液, 四种dNTP, MgCl2, DTT, 牛血清白蛋白, Oligo(dT)引物RNA模板和逆转录酶
C.
逆转录于42℃进行,随后即进行PCR
D.
RT-PCR的最终反应过程依然是以DNA为模板的PCR反应
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皮皮学刷刷变学霸
举一反三
【单选题】What does 'them' refer to in the sentence 'It sent them streaming westward into the wilderness after their predecessors to raise still more children who wanted still more land' ?
A.
Urban dwellers.
B.
Dollars and cents.
C.
Yearners.
D.
Predecessors.
【单选题】What does the word 'them' (in Paragraph . . how readers might use them) refer to?
A.
Shampoo.
B.
Artichokes.
C.
Publications.
D.
Readers.
【简答题】What does the speaker ask them not to do? The speaker asks them not to take ______ out of the forest with them.
【单选题】What does 'them' refer to in the sentence 'It sent them streaming westward into the wilderness after their predecessors to raise still more children who wanted still more land'?
A.
Dollars and cents.
B.
Urban dwellers.
C.
Predecessors.
D.
Yearners.
【单选题】What does "giving them cues" mean?
A.
giving them rhythm
B.
telling them when to do what
C.
telling them to stop
D.
telling them to get off stage
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