“分离土壤中以尿素为氮源的微生物”实验，配制LB全营养培养基的目的是（ ）

根据短文内容，判断正确还是错误。

       My name is Li Hong. I'm 16 years old. I have a lovely brother. His name is Li Qiang. He was short and thin two years ago. He was 1.58 m. He was 48 kg. He was a primary school student. He often watched TV and played games. He didn't like playing football. Now he is handsome. He is 14 years old. He is a junior high school student. He is 1.65m. He is 56kg. He is tall and fat. He is very strong, too. Sometimes he watches TV in the evening. He doesn't play games. He plays football and rides a bike every day.

若直角坐标平面内的两点P、Q满足条件：

①P、Q都在函数y=f（x）的图象上；

②P、Q关于原点对称，则称点对P，Q是函数y=f（x）的一对“友好点对”（点对P，Q与Q，P看作同一对“友好点对”），

已知函数f（x）=$\left\{\begin{array}{c}{\log }_{2}x\left(x>0\right)\\ -x^2-4x\left(x\le 0\right)\end{array}\right.$，则此函数的“友好点对”有（　　）