问题 单项选择题

方差分析的应用条件是

A.计数资料

B.计量资料

C.等级资料

D.样本来自正态总体

E.两个或两个以上均数的比较,且样本来自正态总体。

答案

参考答案:E

完形填空
完形填空。
     Many people do strange things before an earthquake (她震 ). This news 1  
important. Earthquakes can  kill people and   2   homes. The animals may help to
save  3  .
     Some animals 4  a lot of noise before an earthquake. Farmers have been told about this. Dogs    5  are usually quiet have started to bark (吠). Horses on farms have run
around in circles. Mice have left their holes and run away. Cows have given less milk.
In a town in Italy, cats raced down the street   6     a group. That happened only   7   hours before an earthquake. In San Francisco , a man kept tiny (微小的) pet frogs.
One Sunday , the frogs jumped around more than   8   . That night, an earthquake
struck the city.
     People want to know 9   an earthquake is coming. Then they could get away
safely. Right now, there is no sure way   10 ahead of time. Maybe the best idea is to
watch the animals.
( )1. A. may be
( )2. A. knock  
( )3. A. life  
( )4. A. do    
( )5. A. it    
( )6. A. as    
( )7. A. a few  
( )8. A. ever  
( )9. A. where  
( )10.A. know  
B. maybe      
B. knock down
B. the life  
B. produce    
B. they      
B. with      
B. few        
B. ago        
B. how        
B. known      
C. may is  
C. burn    
C. lives    
C. keep    
C. /        
C. in      
C. little  
C. never    
C. when    
C. to know  
D. is may      
D. get burned  
D. the lives  
D. make        
D. that        
D. like        
D. a little    
D. hardly      
D. whether    
D. knowing    
单项选择题