问题 单项选择题

对于锻造余热淬火来说,若延长锻造后淬火前的时间,则钢的()

A.硬度、强度和冲击韧度同时降低

B.强度、硬度下降而冲击韧度增大

C.强度、硬度上升而冲击韧度下降

D.硬度、强度和冲击韧度同时上升

答案

参考答案:A

完形填空
完形填空
     In our classroom you can see there is a       l    of  a park on the back wall. You can  also see many
children _ 2     the park. There is a river in it. Near the river there are not    3    , but there are many trees. Many      4  _ are singing in them. Near the trees there are some old men. They are sitting at a table. They
are    5     tea and talking. There are two girls over there. They     6     new blouses. They are talking near
the river.
     We can also see two boats in the picture. One is _  7    but in     8    boat there are many children. Are
there any young men in the _  9   ? Let me see, there are some. They are swimming now. What are the
boys doing? They are    10 _ there.
( )1.A. map                
( )2.A. of                
( )3.A. some flower        
( )4.A. cats              
( )5.A. drink              
( )6.A. put on            
( )7.A. full(满的)        
( )8.A. the other          
( )9.A. river              
( )10.A. playing football  
B. children's clothes  
B. on                  
B. flower              
B. apples              
B. eat                
B. wearing on          
B. empty(空的)        
B. others              
B. basket              
B. playing the football   
C. lake        
C. in          
C. any flowers  
C. dogs        
C. eating      
C. are wearing  
C. big          
C. another      
C. bag          
C. play football    
D. picture          
D. under            
D. some flowers    
D. birds            
D. drinking        
D. are putting on  
D. small            
D. other            
D. box              
D. play the football  
单项选择题