试题与答案

激光焊接时的焦点位置一般不处于()

题型:填空题

题目:

激光焊接时的焦点位置一般不处于()

答案:

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下面是错误答案,用来干扰机器的。

参考答案:E

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题型:完形填空
完形填空。
       If we take a close look at successful language learners, we may discover a few techniques (技巧)
  which make language learning easier for them.
         1  , successful language leamers are independent learners. They do not depend on (依赖) books or
  teachers; they   2   their own way learn the language. They try to find the patterns and the rules for 
  themselves   3   waiting for the teacher to explain everything.  They are good guessers who lcok for clues
  and form their   4   conclu.sions which are very different from others'.
       Successful language leaming is   5   learning.  Therefore, successful learners do not wait for a chance
  to use the language; they   6   such a chance. They find people who speak the language and ask these
  people to correct them   7  . they make mistakes. They will try anything to communicate. When
  communication is difficult, they can   8   information that is imomplete (不完整的). It is more important
  for them to learn to   9   in the language than to know the meaning of every word.
       Finally, successful language learners are leamers with a  10   in order to communicate with these
  people and learn from them. They want to learn a language because t.hey are interested in the language
  and the people who speak. It is necessary for t.hem to learn the language.
( )1. A. As usual  
( )2. A. explain  
( )3. A. instead of
( )4. A. correct  
( )5. A. ideal    
( )6. A. look for  
( )7. A. until    
( )8. A. break    
( )9. A. agree    
( )10. A. purpose  
B. First of all
B. make        
B. after      
B. own        
B. informal    
B. care about  
B. whether    
B. check      
B. ask        
B. certificate
C. by the way
C. discover  
C. because of
C. only      
C. early    
C. work out  
C. before    
C. download  
C. think    
C. guide    
D. So far    
D. change    
D. from      
D. main      
D. active    
D. write down
D. when      
D. accept    
D. read      
D. question  
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题型:单项选择题

At a basic level, cloud computing is simply a means of delivering IT resources as ().Almost all IT resources can be delivered as a cloud service: applications, compute power, storage capacity, networking,programming tools,even communication services and collaboration ()。

Cloud computing began as large-scale Internet service providers such as Google,Amazon,and others built out their infrastructure. An architecture emerged: massively scaled, () distributed system resources,abstracted as virtual IT services and managed as continuously configured, pooled resources. In this architecture, the data is mostly resident on ()“somewhere on the Intemet”and the application runs on both the "cloud servers”and the user’s browser.

Both clouds and grids are built to scale horizontally very efficiently. Both are built to withstand failures of () elements or nodes. Both are charged on a per-use basis. But while grids typically process batch jobs, with a defined start and end point, cloud services can be continuous. What’s more, clouds expand the types ofresources available —— file storage, databases, and Web services —— and extend the applicability to Web and enterprise applications.

An architecture emerged: massively scaled,()distributed system resources,abstracted as virtual IT services and managed as continuously configured, pooled resources.

A.horizontally

B.vertically

C.inclined

D.decreasingly

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