问题 解答题

梯形的面积等于平行四边形面积的一半.______.

答案

因为梯形的面积=(上底+下底)×高÷2,平行四边形的面积=底×高,

若不知道二者的底和高的大小关系,则没法比较其面积大小.

故答案为:错误.

单项选择题
完形填空
完形填空。
     Bedtime stories are one of the delights of early childhood. But according to Dr.Julie Sprecadbury form
Queensland University. parents should not   1   up reading to their children   2    they enter mary school. She
says listening to.reading and discussing the stories help chidren's   3   .
     "My   4   indicates that once children can read themseives. most parents stop reading   5   them."
Dr.Spreadbury says.
     "  6  may be at the end of Year I,which is far too   7  ."
     Dr.Spreadbury says   8   reading not only gives children a good start at school.but brings parents and their
children closer.
     "This makes it   9   for then to open up and talk to parents about things that are worrying them,or things
they are   10   in their everyday life."
( )1. A. speed    
( )2. A. after    
( )3. A. thinking 
( )4. A. theory   
( )5. A. about    
( )6. A. Some     
( )7. A. difficult
( )8. A. daily    
( )9. A. easier   
( )10. A. reading 
B. keep           
B. until          
B. comprchension  
B. research       
B. from           
B. Most           
B. early          
B. healthy        
B. funnier        
B. promising    
C. give          
C. if            
C. relaxation    
C. story         
C. to            
C. They          
C. much          
C. fast          
C. rarer         
C. celebrating 
D. hold       
D. unless     
D. development
D. decision   
D. through    
D. That       
D. informat   
D. bedtime    
D. clearer    
D. receiving