问题 解答题

数据100,120,80,130,100,90,150的中位数是130______.

答案

先对这组数据按从小到大的顺序重新排序:80,90,100,100,120,130,150.

此组数据个数是奇数个,位于最中间的数是100,

所以这组数的中位数是100.

故答案为:错误.

完形填空
完形填空。  
     I work   1   a small shop. It is near a factory. Every day   2   people come to the shop   3   things.    
My   4   is very near the shop. I get   5   at six, have   6   and then go to work by bike. I put some food
in my lunch box.    
     I get to the shop at seven. At seven thirty people begin to get there. They buy   7    , eggs and many
other things.    
     I have my lunch   8   . At seven in the evening, we close the shop. I clean the shop and then go home
  9   supper.    
     Some people may not think my work   10   good. But I like it very much.
( ) 1. A. on                      
( ) 2. A. much                  
( ) 3. A. to buy                  
( ) 4. A. family                 
( ) 5. A. up                      
( ) 6. A. lunch                  
( ) 7. A. many bread              
( ) 8. A. in the middle of the day
( ) 9. A. at                     
( ) 10. A. is                   
B. near          
B. a lot        
B. to sell      
B. home        
B. down        
B. supper        
B. some meats    
B. in the morning
B. for         
B. are          
C. behind                 
C. many                    
C. buys                   
C. houses                 
C. off                    
C. breakfast               
C. one kilo and a half milk
C. in the afternoon        
C. up                      
C. isn't                  
D. in              
D. a little        
D. sells            
D. bedrooms        
D. on              
D. meals            
D. a lot of drink  
D. in the evening  
D. down            
D. aren't          
单项选择题