搜题请搜索小程序“爱下问搜题”
问题 单项选择题

(74) (74) is the foundation on which applications are built.

A．User
B．Display
C．Printer
D．Operation system

答案

参考答案：D

解析：
操作系统是基础，应用都是建于其上。

完形填空
完形填空

     On the first day of my school life in the USA, I showed a great interest in my marketing class. My
teacher, Mrs. Tolman, suggested I  __1__  a national marketing club called DECA attracting many
students with talent and interest in  __2__. So I did.    
     The first  __3__  was to raise money for the marketing competition later in the year by selling
candles. Mrs. Tolman said the competition was due in a week and that 40 percent of the  __4__ would
go into my personal account.    
     At the beginning, I tried to sell some candles to my host mom. She said that if I could   __5__  
confidence and do a wonderful sales presentation, she would certainly buy some. I started my  __6__    
with a firm handshake. Then I introduced all the different kinds of candles and the special sales I could
offer and  __7__  her that our candles were the best choices for gifts and home decorations. Finally
she bought three candles.    
     Greatly  __8__  I decided to sell my candles around the neighborhood. On Saturday morning, with
great courage, I knocked at the door of my first potential  __9__.    
     "I'm a student at Skyline High School and we are __10__  money for DECA. I'm trying to sell..."  
      "Not today, sorry, "  the man interrupted me and __11__  the door.    
     Embarrassed, I walked away and said to myself the __12__ thing that might happen was being
refused like that again. I couldn't even count how many times I was __13__  with reasons like "Not
today" , "I don't have any __14__ money right now" or "I just bought some". __15__, I had to continue
with the day. __16__, a woman kindly bought nearly  $ 60 worth of candles. I couldn't even hide my 
__17__  and said "Thank you very much" to her with a bow.    
     After a  __18__  hard work, I turned in my $408 worth of sales of candles, which gave me $163 in
my own account. I was __19__  to find out I was the second highest seller in all classes.    
     It was the first time that I had worked as a sales person. This experience let me know that __20__ 
difficulties was only wasting time and a barrier in my way to success.

( )1. A. hold          
( )2. A. business      
( )3. A. chance        
( )4. A. income        
( )5. A. express      
( )6. A. presentation  
( )7. A. told          
( )8. A. puzzled      
( )9. A. buyer        
( )10. A. lending      
( )11. A. opened      
( )12. A. worst        
( )13. A. allowed      
( )14. A. more        
( )15. A. However      
( )16. A. So          
( )17. A. anger        
( )18. A. week's      
( )19. A. puzzled      
( )20.A. overcoming  		B. join          
B. English        
B. way            
B. candles        
B. show          
B. business      
B. convinced      
B. surprised      
B. seller        
B. raising        
B. knocked        
B. uneasy        
B. permitted      
B. extra          
B. So            
B. Secondly      
B. embarrassment  
B. hour's        
B. surprised      
B. dealing with   		C. build        
C. math        
C. challenge  
C. business    
C. make        
C. club        
C. explained    
C. shocked      
C. business man
C. returning    
C. burst into  
C. best        
C. refused      
C. little      
C. Therefore    
C. Firstly      
C. happiness    
C. year's      
C. calm        
C. accepting    		D. set          
D. sports        
D. choice        
D. expense      
D. expect        
D. interest      
D. requested    
D. encouraged    
D. shop keeper  
D. borrowing    
D. shut          
D. unhappiest    
D. demanded      
D. left          
D. For          
D. Finally      
D. sad          
D. month's      
D. lucky        
D. worrying about
查看答案
填空题

设有图书管理数据库：
图书(总编号C(6)，分类号C(8)，书名C(16)，作者C(6)，出版单位C(20)，单价N(6,2))
读者(借书证号C(4)，单位C(8)，姓名C(6)，性别C(2)，职称C(6)，地址C(20))
借阅(借书证号C(4)，总编号C(6)，借书日期D(8))
对于图书管理数据库，查询每类图书中多于1册的册数和平均单价，请对下面的SQL语句填空：
SELECT分类号，COUNT(*)，AVG(单价)FROM图书；
(12) 分类号 (13)

查看答案