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【单选题】
下列有关PCR的描述错误的是( )A.
每一循环要经过变性→退火→延伸三个过程
B.
变性温度常用95℃
C.
退火温度一般较引物Tm值低25℃
D.
Taq酶最适延伸温度为72℃
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举一反三
【简答题】I haven't had much ________ (succeed) in my applications for jobs.
【简答题】reading, readable The words and numbers in the table should be clearly__1____. I haven't had time to d much ___2___ lately.
【简答题】I haven't had time to do much _________ lately.
【简答题】The words and numbers in the table should be clearly ____. I haven't had time to do much ____ lately.
【单选题】i haven't had time to do much _______lately.
A.
reader
B.
reading
C.
read
D.
readable
【单选题】________________ you haven't had much time to do this, I think you've done it very well.
A.
Unless
B.
Given that
C.
Whether
D.
When
【单选题】听力原文：W: I hope you'll all appreciate this steak. Recently we haven't had much steak because beef is quite expensive these days. M: How much did you pay for it? What are they talking about?
A.
The quality of steak.
B.
The falling price of beef.
C.
The rising price of beef.
D.
The price of beef.
【单选题】下列对Internet叙述正确的是___
A.
Internet就是www
B.
Internet是众多自治子网和终端用户机的互联
C.
.Internet就是信息高速公路
D.
Internet就是局域网互联
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