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原核生物转录产生的mRNA需要加工吗?为什么? 真核生物成熟的 mRNA和原核生物mRNA有哪些区别?
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【简答题】完形填空。 My name is Lily. My father is a teacher. His students love him a lot because he is funny. I love him, too, but I think he can be 'foolish' 1 . Once we moved into a new house and had to go shoppi...
【多选题】根据自组织理论,下面那些是系统进化需要的条件
A.
系统必须处于开放状态，同外部环境有物质、能量或信息的交流。
B.
系统处于远离平衡的状态。
C.
系统具有非线性相互作用。
D.
系统具有内部涨落（即对平均状态的偏离）
【简答题】创建一个视图文件OC,包含orders(别名O)的orderid列,customers(别名C)的companyname,address列。两表均包含customerid列,请写出代码。
【简答题】创建一个视图文件PS,包含products(别名P)的productid,productname列,suppliers(别名S)的companyname,address列。两表均包含supplierid列,请写出代码。
【简答题】My name is Lily. My father is a teacher. His students love him a lot because he is funny. I love him, too, but I think he can be “foolish” 41 . Once we moved into a new house and had to go shopping to...
【单选题】Which of the following gives the best definition for metonymy?
A.
It is a figure of speech in which a term for a part of something refers to the whole of something or vice versa.
B.
It is a figure of speech in which the name of one thing is used for that of another of which it is an attribute or with which it is associated.
C.
It is a figure of speech in which one thing is mentioned to stand for another in that there is some similarity between them.
D.
It is a figure of speech in which personal qualities are attributed to nonhuman things or abstract notions.
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