问题 单项选择题

当无耗传输线处于行波状态时,下面哪句话是错误的()。

A.行波状态是无反射的传输状态,反射系数等于0

B.沿线电压和电流振幅不变,驻波比等于0

C.电压和电流在任意点上都同相

D.传输线上各点阻抗均等于传输线特性阻抗

答案

参考答案:B

完形填空
完形填空。
     One day a boy was walking along the street.Suddenly he   1   and looked up into the sky. A young man
passed by him. When he saw the boy,he felt curious (好奇的)   2   looked up, too. Just then a girl came   3   
and saw them. "Is there   4   in the sky?" She thought and looked up,too. In a minute,there were quite some
people   5   great interest in the clear blue sky. Suddenly the boy asked, "Hey,   6   are all you looking up at?"
"That's what we   7   ask you,"said the young man."You want to   8   me?But I wasn't looking at   9 ,"said
the boy. "I   10   my head upward because my nose bled(出血)"
( )1. A. went on            
( )2. A. or                 
( )3. A. out                
( )4. A. anything interesting
( )5. A. giving             
( )6. A. why                
( )7. A. is going           
( )8. A. catch              
( )9.  A. something         
( )10. A. put  up           
B. stopped               
B. so                    
B. in                    
B. interesting  something
B. seeing                
B. where                 
B. are going to          
B. ask                   
B. anything              
B. get on                
C. walked            
C. but               
C. up                
C. anything interest 
C. showing           
C. how               
C. shall go          
C. tell              
C. nothing           
C. get up            
D. sat                   
D. and                   
D. down                  
D. interesting anything
D. looking             
D. what                  
D. will going to         
D. say                   
D. /                     
D. take down           
单项选择题 A1型题