看图列算式。

总共有几只金鱼？

    My name is Tom. I'm nine. This is my mother(母亲). Her name's Linda Johnson. Her telephone number is 13052864515. And this is my father(父亲). His name is Mike Johnson. His phone number is 13120884699. And this is my sister(姐妹). What's her name? Her name is Mary. Look! The boy is my brother(兄弟) Nick. Mary is eight and Nick is six.

已知全集U={0,1,2,3,4}，集合A={0,1,2,3}，B={2,3,4}，那么$C_U\left(A\cap B\right)$=  （     ）

比较大小：2$\sqrt{5}$ ____5．

①坚持一个中国的原则

②在台湾实行民族区域自治制度

③用武力解决台湾问题，实现祖国的完全统一

④紧密结合，共同奋斗，为两岸同胞谋福祉