求函数y=lgxx2-7x+12的定义域.

题型:解答题

问题:

求函数y=
lg
x
x2-7x+12
的定义域.
考点:函数的定义域、值域对数函数的解析式及定义(定义域、值域)
题型:解答题
完形填空。
    Last winter, when I was heavily pregnant(怀孕), I was visiting my sister and brother-in-law's
house. I had to park my car in a nearby parking lot because they didn't have a place for parking.
The snow was extremely heavy and there was lots of    1   on the ground, so not many people
dared to go out that evening! When I left their house and    2   to my car around 11pm, I noticed
that my car was the only one    3   .
     Surrounded by silence, I rushed into the car nervously. When I finally tried to   4   away, my
wheels began to spin(打滑). I realized I was stuck! I wondered what I should do.   5   , in my
rear-view mirror(后视镜), I saw four teenage boys    6   my car. They were walking side by side
in a line and behaved a bit like    7   - at least I thought that was what they looked like. My
car was in a very    8   area and I was so frightened when I saw them. I was certain they were
coming to my car to    9   me.
     Terrified, I just froze. One of the young men tapped on my window    10   and said, "Excuse
me, Madam, would you like some    11   ? You seem to have a problem with the car." Still a little
afraid, I said, "I am stuck." And the young man said, "It's okay. Stay in your car and we'll    12  
you out of the snow." And they did! When they finally got my car out of the snow, they   13   and
waved good-bye to me. I rolled down my window and thanked them,     14   to have judged them
so poorly.
     People like to judge the person they come across, and they are in turn judged by others. It's
natural that we judge others, but when we do this, we shouldn't    15   the old saying, "Don't judge
a book by its cover."
( ) 1. A. sand    
( ) 2. A. looked
( ) 3. A. left  
( ) 4. A. walk  
( ) 5. A. Actually
( ) 6. A. damaging
( ) 7. A. robbers
( ) 8. A. secret
( ) 9. A. support
( )10. A. rapidly
( )11. A. change
( )12. A. pull  
( )13. A. waited
( )14. A. sorry  
( )15. A. hate  
B. ice    
B. escaped
B. destroyed
B. run    
B. Suddenly  
B. touching
B. students
B. bright  
B. harm    
B. loudly  
B. advice  
B. push    
B. shouted
B. delighted
B. stop    
C. stone    
C. returned  
C. prepared  
C. drive    
C. Obviously  
C. hitting  
C. policemen
C. lonely    
C. serve    
C. helplessly
C. fun      
C. lead      
C. smiled    
C. confident
C. follow    
D. water          
D. pointed        
D. sold          
D. get            
D. Finally        
D. approaching    
D. soldiers      
D. dirty          
D. warm          
D. gently        
D. help          
D. put            
D. joked          
D. frightened    
D. forget        

题型:解答题

在20世纪50年代召开的一次国际会议上,“周恩来并不打算改变任何一个坚持 * * 立场的领导人的态度,但是他改变了会议的航向”,这是因为周恩来提出了[ ]

A.独立自主原则

B.和平共处原则

C.团结反帝方针

D.求同存异方针

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假设保护方式下Pentium微处理器的(DS)=0103H,则下列哪一种类型的段能被访问 ( )

A.DPL=00

B.DPL=01

C.DPL=10

D.DPL=11

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A.辩证唯物主义决定论的观点
B.形而上学机械唯物决定论的观点
C.历史宿命论的观点
D.唯心主义非决定论的观点

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