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问题 单项选择题

孔的尺寸总是小于轴的尺寸，称为（）配合

A、过盈

B、间隙

C、过度

D、加工

答案

参考答案：A

完形填空
完形填空。
     This is  1  bedroom. It's a nice room. You can see a bed, two  2 , a chair and a baseball on the floor.
What  3  see on the wall? You can see  4  and a kite on the wall. You can also (还) see a window 5  wall.
Where's  6   light (灯)? It's on  7   table. Some plants are on the table  8 . Where   9   his pencil-box and books?
They're on the other (另一个) table. You can see a clock  10  it. Under the chair is his baseball. It's a nice
bedroom.
( )1. A. Li Lei    
( )2. A. tables   
( )3. A. you can  
( )4. A. the picture
( )5. A. in the   
( )6. A. a     
( )7. A. one    
( )8. A. to     
( )9. A. are    
( )10. A. in    
B. of Li Lei 
B. table   
B. can you  
B. picture  
B. in    
B. the   
B. the one  
B. too   
B. is    
B. at    
C. Li Lei’s
C. tabels  
C. can   
C. pictures 
C. on the  
C. some   
C. a    
C. and   
C. am    
C. under  
D. of Li Lei’s
D. tabel       
D. you         
D. of picture  
D. on          
D. an                                     
D. the         
D. or          
D. do          
D. on          
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单项选择题

设函数，要使f（x）在x＝0处连续，则常数a的值为（）。

A.0

B.1

C.-1

D.2
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