问题 单项选择题

设有员工实体Emp(员工号,姓名,性别,年龄,出生年月,联系方式,部门号),其中“联系方式”要求记录该员工的手机号码和办公室电话,部门号要求参照另一部门实体Dept的主码“部门号”。Emp实体中存在派生属性和多值属性: (54) ;对属性部门号应该进行 (55) 约束;可以通过命令 (56) 修改表中的数据。

(54)处填()。

A.年龄和出生年月

B.年龄和联系方式

C.出生年月和联系方式

D.出生年月和年龄

答案

参考答案:B

完形填空
完形填空。
     One day, a young man asked Albert Einstein,  1  great German scientist,  2  the secret (秘密) of success
(成功) was.The scientist  3  him that the secret of success is hard work. A few days  4  the young man asked
him the  5  question again. Einstein was very  6  . He did not say  7  , but wrote a few  8  on a piece of paper and  9  it to the young man. The young man looked  10  the piece of paper. On it was  11  : A=X+Y+Z." What 
 13  this mean?" asked the young man."A means success," 14  the old scientist."X means hard work, Y means
good methods (方法), and Z…Z mean 59 talking and start to  15  ."
( )1. A. a        
( )2. A. who      
( )3. A. told     
( )4. A. ago      
( )5. A. easy     
( )6. A. worried  
( )7. A. anything 
( )8. A. words    
( )9. A. to hand  
( )10. A. on      
( )11. A. answered
( )12. A  will    
( )13. A. said    
( )14. A. go on   
( )15. A. do      
B. the     
B. whether 
B. said    
B. before  
B. good    
B. happy   
B. something
B. word    
B. hand    
B. up      
B. written 
B. shall   
B. thought 
B. stop    
B. read    
C. one     
C. what    
C. talked  
C. earlier 
C. different
C. angry   
C. nothing 
C. sentences
C. handed  
C. down    
C. read    
C. does    
C. believed
C. enjoy   
C. write   
D. some               
D. which              
D. spoke              
D. later              
D. same               
D. disappointed (失望) 
D. everything         
D. sentence           
D. handing            
D. at                 
D. found              
D. did                
D. told               
D. try                
D. work               
判断题