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问题 单项选择题

超声波探伤仪在单位时间内所产生的脉冲数目叫做（）。

A.脉冲长度

B.脉冲恢复时间

C.频率

D.脉冲重复频率

答案

参考答案：D

完形填空
完形填空。

     Most children like    1    TV. TV is very interesting. On TV    2    can learn a lot, and they can see and
know many things    3    their country and the world. Of course, they can    4    over the radio. But they
can learn better and more easily with   5   . Why? Because they can hear and watch at the same time. But
they can't   6    anything over the radio.
      Many children watch TV    7   Saturday or Sunday evenings. They are very busy with their lessons on 
  8   . But a few children watch TV every    9  . They go to bed very late. So they can't have a good   10   .
How about you, my young friend?

(     )1.A.watch
(     )2.A.we    
( )3.A. about   
( )4.A.sing  
( )5.A.radio 
(     )6.A.hear  
( )7.A.in   
( )8.A.weekend
( )9.A.place 
( )10.A.rest

B.to watch
B.you    
B. on    
B.learn           
B.film         
B.like   
B.on   
B.Sunday  
B.time 
B.time 

C.watches 
C.they   
C.at    
C.dance        
C.game   
C.see    
C.to    
C.Saturday 
C.man
C.game     

D.to watching 
D.I                     
D.with                  
D.hear                   
D.TV                    
D.learn                  
D.for                     
D.weekdays            
D.night 
D.meal            
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单项选择题

根据《国际内部审计专业实务框架》，内部审计活动的独立性通过以下哪项来获得

A．人员配备和监督。
B．持续的专业发展和应有的职业审慎。
C．人际关系和沟通。
D．机构状况和客观性。
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