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【单选题】
庆大霉素属于（）
A.
β-内酰胺类
B.
大环内酯类
C.
氨基糖苷类
D.
喹诺酮类
E.
磺胺类
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参考答案：
举一反三
【单选题】旅游活动是一种综合性的审美活动,要求导游人员具有一定 的()
A.
政治;经济和社会知识
B.
历史;文化;民俗知识
C.
政策法规知识
D.
心理学和美学知识
查看完整题目与答案
【单选题】属于化学热处理的是( )
A.
表面淬火
B.
分级淬火
C.
渗碳
D.
退火
查看完整题目与答案
【简答题】There are lots of ways to raise awareness for a cause. Usually, the __1__ the idea is, the more it gets noticed. And that's precisely why one __ 2 __Frenchman has caught our attention. Baptiste...
查看完整题目与答案
【单选题】Gordon Gekko has assembled a portfolio consisting of ten 90-day US Treasury bills, each having a face value of $1000 and a current price of $990.10, and 200 90-day European call options, each written ...
A.
$190.495
B.
$200.495
C.
$215.495
D.
$300.495
查看完整题目与答案
【判断题】会计资料的生成和提供必须符合国家统一的会计准则制度的规定。( )
A.
正确
B.
错误
查看完整题目与答案
【简答题】Hoxne pepper pot write no more than three words and/or a number. Why is it important? 1. It shows us how important and far-reaching trade was in the 1._________ · The pot was found in England · Pepper...
查看完整题目与答案
【单选题】According to the text, research has found that people prefer to work with______.
A.
those similar to them
B.
those with less mental competence
C.
people whom they like
D.
people who like to tell jokes
查看完整题目与答案
【多选题】There are several important differences between genomic DNA clones and cDNA clones. What are the differences?
A.
Genomic clones represent a random sample of all of the DNA sequences found in an organism’s genome and, with very rare exceptions, will contain the same sequences regardless of the cell type from which the DNA came.
B.
Also, genomic clones from eukaryotes contain large amounts of noncoding DNA, repetitive DNA sequences, introns, regulatory DNA, and spacer DNA; sequences that code for proteins will make up only a few percent of the library.
C.
By contrast, cDNA clones contain predominantly protein-coding sequences, and only those sequences that have been transcribed into mRNA in the cells from which the cDNA was made.
D.
As different types of cells produce distinct sets of mRNA molecules, each yields a different cDNA library. Furthermore, patterns of gene expression change during development, so cells at different stages in their development will also yield different cDNA libraries. Thus, cDNAs can be used to assess which genes are expressed in specific cells, at particular times in development, or under a particular set of conditions.
查看完整题目与答案
【单选题】属于化学热处理的有( )
A.
渗碳
B.
表面淬火
C.
分级淬火
D.
退火
查看完整题目与答案
【简答题】阅读下面短文,从短文后各题所给的 A 、 B 、 C 和 D 四个选项中,选出可以填入空白处的最佳选项。 There are lots of ways to raise awareness for a cause. Usually, the 1 the idea is, the more it gets noticed. And that's precisely why one 2 Frenchm...
查看完整题目与答案
相关题目：
【单选题】旅游活动是一种综合性的审美活动,要求导游人员具有一定 的()
A.
政治;经济和社会知识
B.
历史;文化;民俗知识
C.
政策法规知识
D.
心理学和美学知识
查看完整题目与答案
【单选题】属于化学热处理的是( )
A.
表面淬火
B.
分级淬火
C.
渗碳
D.
退火
查看完整题目与答案
【简答题】There are lots of ways to raise awareness for a cause. Usually, the __1__ the idea is, the more it gets noticed. And that's precisely why one __ 2 __Frenchman has caught our attention. Baptiste...
查看完整题目与答案
【单选题】Gordon Gekko has assembled a portfolio consisting of ten 90-day US Treasury bills, each having a face value of $1000 and a current price of $990.10, and 200 90-day European call options, each written ...
A.
$190.495
B.
$200.495
C.
$215.495
D.
$300.495
查看完整题目与答案
【判断题】会计资料的生成和提供必须符合国家统一的会计准则制度的规定。( )
A.
正确
B.
错误
查看完整题目与答案
【简答题】Hoxne pepper pot write no more than three words and/or a number. Why is it important? 1. It shows us how important and far-reaching trade was in the 1._________ · The pot was found in England · Pepper...
查看完整题目与答案
【单选题】According to the text, research has found that people prefer to work with______.
A.
those similar to them
B.
those with less mental competence
C.
people whom they like
D.
people who like to tell jokes
查看完整题目与答案
【多选题】There are several important differences between genomic DNA clones and cDNA clones. What are the differences?
A.
Genomic clones represent a random sample of all of the DNA sequences found in an organism’s genome and, with very rare exceptions, will contain the same sequences regardless of the cell type from which the DNA came.
B.
Also, genomic clones from eukaryotes contain large amounts of noncoding DNA, repetitive DNA sequences, introns, regulatory DNA, and spacer DNA; sequences that code for proteins will make up only a few percent of the library.
C.
By contrast, cDNA clones contain predominantly protein-coding sequences, and only those sequences that have been transcribed into mRNA in the cells from which the cDNA was made.
D.
As different types of cells produce distinct sets of mRNA molecules, each yields a different cDNA library. Furthermore, patterns of gene expression change during development, so cells at different stages in their development will also yield different cDNA libraries. Thus, cDNAs can be used to assess which genes are expressed in specific cells, at particular times in development, or under a particular set of conditions.
查看完整题目与答案
【单选题】属于化学热处理的有( )
A.
渗碳
B.
表面淬火
C.
分级淬火
D.
退火
查看完整题目与答案
【简答题】阅读下面短文,从短文后各题所给的 A 、 B 、 C 和 D 四个选项中,选出可以填入空白处的最佳选项。 There are lots of ways to raise awareness for a cause. Usually, the 1 the idea is, the more it gets noticed. And that's precisely why one 2 Frenchm...
查看完整题目与答案
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