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问题 单项选择题

在Access 2000中，向数据库中输入数据之前，必须先创建一个（）。

A.表

B.报表

C.视图

D.记录

答案

参考答案：A

完形填空
完形填空。
Dear Tony,
     How was your day    1     ? Did you have fun     2    ? I didn't have a very fun day.
I     3     my cousins. It rained     4    . In the morning,  I stayed in the house and watched
videos, played computer games, and    5     .In the afternoon, Uncle Martin put some of
his old things out in the yard and had a yard     6     !    7    , it was    8    of boring. 
    9     came to the sale    10     the weather was so bad.
     See you soon.
                                                                                                                  Nick
( )1. A. of           
(     )2. A. to camp     
(     )3. A. visited     
( )4. A. a day       
( )5. A. readed      
(     )6. A. house       
( )7. A. Unfortunately
( )8. A. kinds       
( )9. A. Someone     
( )10. A. so         
B. off       
B. camps     
B. to visit  
B. all day   
B. reading   
B. room      
B. Unfortunate
B. lot       
B. Anyone    
B. because   
C. on         
C. camping    
C. visiting   
C. all the day
C. to read    
C. sale       
C. Unfortunatly
C. kind       
C. Everyone   
C. as         
D. in        
D. camp      
D. visit     
D. all days  
D. read                   
D. in sale   
D. Fortunately
D. little    
D. No one    
D. that      
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填空题

硅酸盐是组成复杂的一大类化合物，其化学式可表示为金属氧化物和非金属氧化物的加合物．如将Na2SiO3（偏硅酸钠）表示为Na2O•SiO2．用于治疗胃溃疡的药物三硅酸镁（Mg2Si3O8•nH2O）不溶于水，服用后能中和胃酸且作用持久．试将三硅酸镁改写成氧化物加水合物形式：______，写出它中和胃酸（HCl）的化学方程式（生成物都是只含两种元素的化合物）______．
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