问题 单项选择题

至今为止,计算机中的所有信息仍以二进制方式表示的理由是 ( )

A.节约元件

B.运算速度快

C.物理器件性能所致

D.信息处理方便

答案

参考答案:C

解析: 计算机是信息处理的工具。不论是数字、文字、声音、图画,还是其他类型的信息,他们都必须转换成二进制形式表示以后,才能由计算机进行计算、处理、存储和传输,这是由它的物理器件性能所决定的。

完形填空
完形填空。
     These days it is found that school students hardly have any sports. Is it because they have no  1  in
sports? It may not be true. They often say they have much more important things to do. What are these
important things? Exams! They have to   2   themselves ready for all kinds of exams and tests in school.
So many of them almast become bookworms (书呆子). In the past in the sununer holidays, they could
do everything they liked,but now they have to  3    all their time preparing their lessons. So  4   have kept
them away from sports.
     5  their parents and teachers give them morepressure (压力), they have to work _6 and spend most
of their time on books. As for the students themselves, they don't want to  7   in the exams because they
want to further their studies. So it is necessary to give all of their spare time to their studies and   8  up
their school sports.
    It's true that a good education can not go withoutphysical training (体育锻炼). A quick mind hardly
goes along with a  9   body. Without a strong body,you can never do anything well, and  10   can you
make great success in life?
( )1. A. time    
( )2. A. make    
( )3. A. pay    
( )4. A. teachers
( )5. A. And    
( )6. A. earlier
( )7. A. miss    
( )8. A. give    
( )9. A. strong  
( )10. A. when  
B. like    
B. have    
B. spend  
B. parents
B. Or      
B. later  
B. lose    
B. take    
B. heavy  
B. how    
C. hobby  
C. get    
C. take    
C. students
C. Because
C. harder  
C. leave  
C. put    
C. weak    
C. where  
D. interests
D. let      
D. cost      
D. holidays  
D. But                       
D. quicker  
D. fail      
D. send      
D. ill      
D. why      
选择题