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问题 填空题

单指令流、多数据流的英文缩写是 【2】 。

答案

参考答案：SIMD

解析： 从指令系统来看，奔腾Ⅲ增加了70条新指令，称为SSE，即Streaming SIMD Extensions，意为流式的单指令流、多数据流扩展指令。

完形填空
完型填空。

   Hello. I'm Tom. I'm a middle school student. It's nice to meet you here. First, let me tell you    1  about
my family. There are five people in my  _ 2   . They are my mother, my father, my sister, my brother and
me.
   My father is a worker. My mother is an English teacher. My sister is eighteen and my brother is sixteen. I'm fourteen. We    3  go to the same school. We all enjoy   4   football games.
   My    5   is at West Street. There is a big tree and some small trees around my house. The big one is a
pear tree and the small ones are apple    6  ,    7  there    8   any pears or apples on them now.    9    a
photo of my house. In the photo, you can see three cats in my house. They are all black and white. We 
  10   them very much.

( )1.A. anything  
( )2.A. school    
( )3.A. two        
( )4.A. seeing    
( )5.A. bedsore    
( )6.A. trees      
( )7.A. but        
( )8.A. isn't      
( )9.A. He's      
( )10.A. are liking		B. something
B. house    
B. five      
B. looking at        
B. school    
B. rivers    
B. and      
B. is        
B. She's    
B. likes     		C. thing  
C. room    
C. three  
C. watching       
C. room    
C. houses  
C. so      
C. are    
C. it's    
C. like    		D. anyone  
D. family  
D. six      
D. looking        
D. home    
D. schools  
D. or      
D. aren't  
D. There's  
D. is liking
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综合

读图2-1-46，分析并完成下列问题。

中国在世界人口和耕地中所占百分比

今后我国人口和耕地发展的可能趋势

图2-1-46

(1)目前，我国以占世界_________％的耕地养活着占世界_________％的人口。

(2)今后我国人口发展的可能趋势是_________，耕地发展的可能趋势是_________。

(3)我国耕地承载量所面临的问题是 __________________ 。

(4)目前国家对解决上述问题所采取的政策和措施是 。
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