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问题 单项选择题

查询功能的编辑记录主要包括
①添加记录 ②修改记录 ③删除记录 ④追加记录

A．①②③

B．②③④

C．③④①

D．④①②

答案

参考答案：A

解析： 查询功能的编辑包括添加、修改和删除，不包括在追加记录内。

完形填空
完形填空。
     I've never been late for school, but yesterday I came very close. My alarm clock didn't    1    , and
by the time l woke up, my father had already    2     into the bathroom and had to wait for him    3    . I
had to really rush, I took a quick shower, and had some breakfast, and then    4     to the bus stop.  
Unfortunately, by the time I got there, the bus had    5     left.  I started walking, but I knew I couldn't get
to school    6     time. Luckily, my friend Tony and his Dad came    7    in his Dad's car and they    8    
me a ride. When I got to school,  the final bell    9    .  I   10    made it to my class.
( ) 1. A. go off      
( ) 2. A. went        
( ) 3. A. to come out  
( ) 4. A. run off      
( ) 5. A. never        
( ) 6. A. in          
( ) 7. A. on          
( ) 8. A. get          
( ) 9. A. was ringing  
( ) 10. A. just only   		B. turn off      
B. go            
B. coming inside
B. walked        
B. ever          
B. at            
B. by            
B. gave          
B. rang          
B. only          		C. set off      
C. gone          
C. to go outside
C. ran off      
C. already      
C. on            
C. close        
C. give          
C. rung          
C. only just    
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选择题

下列计算正确的是（　　）

A．2a2•2a2=4a2

B．2x2•3x3=5x5

C．x•y=（xy）4

D．（-3x）2=9x2
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