问题 问答题 简答题

何谓多源性室性期前收缩?

答案

参考答案:

室性期前收缩异位起搏点来自两个以上称多源性室性期前收缩。心电图表现为联律间期不等,QRS波形态不同。

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 learners are independent learners. They do not depend on(依赖) books or teachers;
they     2     their own ways to 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 look  for  clues and  form their    4    
conclusions which are very different from others'.
     Successful language learning 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 incomplete(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 learners with a    10   in order to communicate with   these   people and
learn from them.    They   want to learn a language because they are interested in   the language and the people who
speak it. It is necessary for them 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. workout    
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      
选择题