Do you know that fish come out of eggs when they were born? After the baby fish comes out of the egg，it eats the food in the egg. When it is big enough，it leaves the egg. It swims in the water. You can see the eyes and the nose. Its ears are hidden (藏) in the head.

    Some fish eat other fish. The fish that eat plants have smaller mouths and teeth. The fish that eat other fish need larger mouths and stronger teeth.

Fish are usually dark on the top and light on the bottom.

①我国仍处于社会主义初级阶段

②共同富裕是社会主义的根本原则

③要把扶贫工作作为当前的中心工作

④有利于让全体人民共享经济发展成果

金玉其外，____。多行不义____。

成事不足，____。百足之虫，____。

江山易改，____。