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【单选题】
单相绕组的基波磁动势为 。
A.
椭圆磁动势
B.
圆形磁动势
C.
脉振磁动势
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【单选题】专门查询机票信息的检索系统是(  )
A.
目录型检索工具
B.
网址导航
C.
全文搜索引擎
D.
垂直搜索引擎
查看完整题目与答案
【单选题】_____the early flight,we ordered a taxi in advance and got up very early.
A.
Catching
B.
Caught
C.
To catch
D.
Catch
E.
Havig caught
查看完整题目与答案
【判断题】专门查询机票信息的检索系统是专题搜索引擎。
A.
正确
B.
错误
查看完整题目与答案
【单选题】它是最早成为中国被迫开放的通商口岸之一,工人阶级在这里首先登上政治舞台,中国共产党也从这里开始踏上革命征程。今天,它已经成为长江流域经济起飞的龙头。它是 ( )
A.
北京
B.
武昌
C.
武汉
D.
上海
查看完整题目与答案
【判断题】特种设备是指涉及生命安全、危险性较大的锅炉、压力容器(含气瓶，下同)、压力管道、起重机械、客运索道、大型游乐设施和场(厂)内专用机动车辆共7种。()
A.
正确
B.
错误
查看完整题目与答案
【判断题】《特种设备安全监察条例》规定，特种设备是指涉及生命安全、危险性较大的锅炉、压力容器、压力管道等八种设备。
A.
正确
B.
错误
查看完整题目与答案
【多选题】How is the protein synthesis initiated in eukaryotes?
A.
In eukaryotes, an initiator tRNA, charged with methionine, is first loaded into the P site of the small ribosomal subunit, along with additional proteins called translation initiation factors.
B.
The initiator tRNA is distinct from the tRNA that normally carries methionine. Of all the tRNAs in the cell, only a charged initiator tRNA molecule is capable of binding tightly to the P site in the absence of the large ribosomal subunit.
C.
Next, the small ribosomal subunit loaded with the initiator tRNA binds to the 5ʹ end of an mRNA molecule, which is marked by the 5ʹ cap that is present on all eukaryotic mRNAs. The small ribosomal subunit then scans the mRNA, in the 5ʹ-to-3ʹ direction, until it encounters the first AUG.
D.
When this AUG is recognized by the initiator tRNA, several of the initiation factors dissociate from the small ribosomal subunit to make way for the large ribosomal subunit to bind and complete ribosomal assembly. Because the initiator tRNA is bound to the P site, protein synthesis is ready to begin with the addition of the next charged tRNA to the A site.
查看完整题目与答案
【单选题】_____the early flight , we ordered a taxi in advance and got up very early.
A.
Catching
B.
To catch
C.
Caught
D.
Catch
查看完整题目与答案
【单选题】1928年底,在东北宣布"遵守三民主义,服从国民政府,改易旗帜"的是( )。
A.
杨虎城
B.
张作霖
C.
阎锡山
D.
张学良
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【单选题】Medea promised to help Jason, but only on the condition that if he succeeded, ( ).
A.
he would give the golden fleece to her
B.
he would let her be free
C.
he would take her to travl around the world
D.
he would take her with him and marry her
查看完整题目与答案
相关题目：
【单选题】专门查询机票信息的检索系统是(  )
A.
目录型检索工具
B.
网址导航
C.
全文搜索引擎
D.
垂直搜索引擎
查看完整题目与答案
【单选题】_____the early flight,we ordered a taxi in advance and got up very early.
A.
Catching
B.
Caught
C.
To catch
D.
Catch
E.
Havig caught
查看完整题目与答案
【判断题】专门查询机票信息的检索系统是专题搜索引擎。
A.
正确
B.
错误
查看完整题目与答案
【单选题】它是最早成为中国被迫开放的通商口岸之一,工人阶级在这里首先登上政治舞台,中国共产党也从这里开始踏上革命征程。今天,它已经成为长江流域经济起飞的龙头。它是 ( )
A.
北京
B.
武昌
C.
武汉
D.
上海
查看完整题目与答案
【判断题】特种设备是指涉及生命安全、危险性较大的锅炉、压力容器(含气瓶，下同)、压力管道、起重机械、客运索道、大型游乐设施和场(厂)内专用机动车辆共7种。()
A.
正确
B.
错误
查看完整题目与答案
【判断题】《特种设备安全监察条例》规定，特种设备是指涉及生命安全、危险性较大的锅炉、压力容器、压力管道等八种设备。
A.
正确
B.
错误
查看完整题目与答案
【多选题】How is the protein synthesis initiated in eukaryotes?
A.
In eukaryotes, an initiator tRNA, charged with methionine, is first loaded into the P site of the small ribosomal subunit, along with additional proteins called translation initiation factors.
B.
The initiator tRNA is distinct from the tRNA that normally carries methionine. Of all the tRNAs in the cell, only a charged initiator tRNA molecule is capable of binding tightly to the P site in the absence of the large ribosomal subunit.
C.
Next, the small ribosomal subunit loaded with the initiator tRNA binds to the 5ʹ end of an mRNA molecule, which is marked by the 5ʹ cap that is present on all eukaryotic mRNAs. The small ribosomal subunit then scans the mRNA, in the 5ʹ-to-3ʹ direction, until it encounters the first AUG.
D.
When this AUG is recognized by the initiator tRNA, several of the initiation factors dissociate from the small ribosomal subunit to make way for the large ribosomal subunit to bind and complete ribosomal assembly. Because the initiator tRNA is bound to the P site, protein synthesis is ready to begin with the addition of the next charged tRNA to the A site.
查看完整题目与答案
【单选题】_____the early flight , we ordered a taxi in advance and got up very early.
A.
Catching
B.
To catch
C.
Caught
D.
Catch
查看完整题目与答案
【单选题】1928年底,在东北宣布"遵守三民主义,服从国民政府,改易旗帜"的是( )。
A.
杨虎城
B.
张作霖
C.
阎锡山
D.
张学良
查看完整题目与答案
【单选题】Medea promised to help Jason, but only on the condition that if he succeeded, ( ).
A.
he would give the golden fleece to her
B.
he would let her be free
C.
he would take her to travl around the world
D.
he would take her with him and marry her
查看完整题目与答案