根据句义和汉语提示写出英语单词.

1. If you want to eat Chinese food, you should go to the Chinese __________(餐馆).

2. Tom __________(介绍) me to all his family.

3. It's bad __________(礼貌) to eat like that.

4. When I go to see my grandmother, she always makes __________(饺子) for me to eat.

5. When we play games, the girls always like __________(咯咯地笑).

数据库设计的需求阶段主要设计()。

A．程序流程图

B．程序结构图

C．框图

D．数据流程图