问题 单项选择题

由于连接多台计算机之间的线路结构可能是复杂的,因此决定分组如何从通信子网的源结点到达目的结点时需要使用

A.拥塞算法

B.路由选择算法

C.差错控制算法

D.排队算法

答案

参考答案:B

完形填空
完形填空。
     Maria Gomez was born in Peru (秘鲁). She grew up in a small village. She went to school when she was
six years old. She went to an elementary school (小学), but she didn't    1    to high school. Her family was
very    2    and she had to go to work when she was thirteen years old. She worked in a shoe factory.
      When Maria was seventeen years old, her family    3    to the United States. First they lied in Los Angeles,
and then they moved to San Francisco. When Maria    4    to the United States, she was not very happy.
     She missed her friends in Peru, and she couldn't    5    a word of English. She began to study English at
night,    6    work in a factory during the day. Maria studied very hard, and now she speaks English well.
She's    7    at night, but now she's studying typing. She wants to    8    a secretary (秘书).
     Maria still misses her friends in Peru. But she's very happy now, and she hopes she will have a good
future in the new country.
( )1. A. want     
( )2. A. rich     
( )3. A. moved    
( )4. A. talked   
( )5. A. tell     
( )6. A. when     
( )7. A. studying 
( )8. A. do       
B. go         
B. poor      
B. changed   
B. called    
B. talk       
B. so        
B. thinking 
B. work    
C. began          
C. happy        
C. happened         
C. got         
C. know          
C. or              
C. sleeping   
C. be          
D. study       
D. glad       
D. started     
D. spoke    
D. say         
D. and           
D. writing
D. play       
选择题