问题 单项选择题

对于数据文件和它的一个索引文件,如果数据文件中数据记录的排列顺序与索引文件中索引项的排列顺序不一致,则该索引为______。

A.聚集索引

B.非聚集索引

C.稠密索引

D.辅索引

答案

参考答案:B

解析: 对于数据文件和它的一个索引文件,如果数据文件中数据记录的排列顺序与索引文件中索引项的排列顺序不一致,则该索引为非聚集索引。

阅读理解

阅读理解。

     Today is Monday again and it's fine! We just had a test in the science class. I think I did really well. If

 I get a good grade, Mum will let me go to the basketball game next Friday. There I can see my favourite

 basketball player - Kobe. I can't wait!  

     I went to Mark's birthday party with Jenny and Billy on Saturday. I bought him a storybook. We

 listened to music and danced at the party. Then we sang "Happy Birthday" to Mark and had some cake. I

  did have a good time. I hope I can have a birthday party like that when my birthday comes. And I hope I

  can get a new bike on that day.

     Oh, the bell is ringing! It's time to go to the maths class. I hope I don't fall asleep in class!

1. How is the weather today?   

    A. Windy.      

    B. Cold.    

    C. Rainy.    

    D. Fine.

2. What day is tomorrow?

    A. Monday.      

    B. Tuesday.    

    C. Thursday.    

    D. Sunday.

3. How can the writer go to the basketball game next Friday?

    A. By having a test in science.      

    B. By doing well in the science test.

    C. By playing basketball well.      

    D. By going to Mark's birthday

4. How did the writer feel at Mark's birthday party?

    A. Happy.      

    B. Sad.    

    C. Tired.    

    D. Worried.

5. Where did the writer write this diary?

    A. At home.      

    B. In the park.  

    C. At school.    

    D. On the bus.

单项选择题