右图所示战役发生于全面抗战初期，粉碎了日寇三个月灭亡中国的狂妄计划，是抗战以来的首次大捷。（  ）

    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.

函数$f\left(x\right)=\left\{\begin{array}{c}\ln x-x^2+2x\left(x>0\right)\\ 2x+1\left(x\le 0\right)\end{array}\right.$的零点个数为（　　）