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大地房产对外宣称：我们开发楼盘的成本主要由地价、建筑材料、人工工资三部分构成，去年以来，这三项都上涨了10%，现在房价应上涨30%才能保本．你认为开发商的说法正确吗？你的看法怎样？请用学过的数学知识说明理由．

答案

设地价为x，建筑材料为y，人工工资为z，则原来的房价为（x+y+z），

由题意得，房价上涨后需要：（x+y+z）（1+10%），

开发商说的房价为：（x+y+z）（1+30%），

∵（x+y+z）（1+30%）＞（x+y+z）（1+10%），

∴开放商说的不对．

问答题

综合性原则应注意哪些事项?
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     One day,   a poor boy Howard Kelly who was trying to pay his way through school by selling goods
from door to door found that he only had one dime left. He was hungry so he decided to __1__ for a
meal at the next house.
     However,   he lost his nerve __2__ a lovely young woman opened the door. Instead of a meal he
asked for a drink of water.  She thought he looked __3__,   so she brought him a large glass of milk. He
drank it __4__,   and then asked,   "How much do I owe you?"
     "You don't owe me anything,  " she __5__. "Mother has taught me never to accept pay for a __6__."
He said,   "Then I thank you from the bottom of my heart." As Howard Kelly left that house,   he not only
felt __7__ stronger,   but it also increased his faith in God and human race. He was about to give up a nd
quit before this point.
     Years later the young woman became critically ill. The local doctors were baffled. They finally sent her
to a big city,   where specialists can be called __8__ to study her rare disease. Dr. Howard Kelly,   now
__9__,   was called in for the consultation. When he heard the name of the town she came from,   a
 strange light   10   his eyes. Immediately,   he   11   and went down through the hospital hall into her
room. 
       12    in his doctor's gown he went in to see her. He   13   her at once. He went back to the
consultation room and   14   to do his best to save her life. From that day on,   he gave    15   attention
to her case.
     After a long   16   the battle was won. Dr. Kelly   17   the business office to pass the final bill to him
for approval. He looked at it and then wrote something on the side. The bill was sent to her room. She
was afraid to open it because she was   18   that it would take the rest of her life to pay it off. Finally she
looked,   and the note on the side of the bill caught her  19   . She read these words.
     "Paid in full with a glass of milk.
     (Signed) Dr. Howard Kelly
     Tears of joy flooded her eyes as she 20  silently. "Thank you,   God. Your love has spread through
human hearts and hands."

( )1. A. call          
( )2. A. while        
( )3. A. thirsty      
( )4. A. slowly        
( )5. A. shook        
( )6. A. reward        
( )7. A. physically    
( )8. A. up            
( )9. A. poor          
( )10. A. fixed        
( )11. A. rose        
( )12. A. Dressing    
( )13. A. recognized  
( )14. A. desired      
( )15. A. special      
( )16. A. decision    
( )17. A. compressed  
( )18. A. negative    
( )19. A. presentation
( )20. A. praised      		B. make          
B. when          
B. lazy          
B. unexpectedly  
B. announced      
B. kindness      
B. mentally      
B. for            
B. famous        
B. concentrated  
B. raised        
B. Having        
B. knew          
B. declared      
B. ordinary      
B. preparation    
B. requested      
B. uncertain      
B. preference    
B. pretended      		C. beg        
C. though    
C. tired      
C. steadily  
C. replied    
C. hand      
C. normally  
C. off        
C. cruel      
C. filled    
C. got        
C. Putting    
C. spared    
C. determined
C. normal    
C. struggle  
C. confused  
C. positive  
C. attention  
C. pressed    		D. prepare        
D. unless        
D. hungry        
D. sadly          
D. doubted        
D. value          
D. properly      
D. in            
D. vivid          
D. consulted      
D. come          
D. Dressed        
D. regained      
D. declined      
D. usual          
D. debate        
D. ordered        
D. obvious        
D. arrangement    
D. prayed        
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