（）是中国、日本、韩国、朝鲜等东方国家传统的、普遍使用的一种表示敬意的礼节，可以用来

Ⅱ度羊水污染为( )

A．羊水白色昆有胎脂
B．羊水呈浅绿色
C．羊水黄绿色并浑浊
D．羊水棕红色稠厚
E．羊水棕黄色稠厚

冲国革命和建设的基本立足点是( )

A．实事求是
B．独立自主
C．统一战线
D．武装斗争

根据句意，用适当的单词填空

1. My sister is __________, so I have take good care of her at home.

2. __________ the end of the day, we clea'ned the classroom and left for home happily.

3. I don't have __________ money to buy such an expensive MP5 player.

4. Peter,  this is my new car.  Would 'you like to go for a __________ with me in this' afternoon?

5. You should __________ your answers before you hand in(上交) your papers.

在直线外一点向这条直线所画的线段中最短的一条就是这点到直线的______．