用括号中所给词的适当形式填空，使语篇意思完整。

Dear Student,

        My name is Bob. I live in Toronto, Canada, and I want a pen pal in China.  

I think China is a very 1             (interest) country. I’m 14 2              (year) old

and my birthday is 3              (on) November. I can speak English and a little4              (france). I have a brother, Paul, and a sister, Sarah. They 5             

(has) pen pals in the United Kingdom and Australia. I like going to the movies

with my friends and 6              (play) sports. 7              (my) favorite subject in

school is P.E. It’s fun. But I 8           (like) math. It’s too difficult! My favorite

movie is The Long Weekend. Do you know it? It’s 9      (a) action movie.

        Please write and tell me about 10              (you).

数据字典的实现可以有多种途径,但都具有一些共同的特点,以下哪项不属于这些特点

A．充分考虑出错处理

B．容易更新和修改

C．不重复说明信息

D．能方便地查阅数据定义