一级理论和二级理论的区别

Lao Hei frowned, and felt a little dissatisfied when he heard the name Lao Hei. Then he saw this kid carelessly put his hand on his shoulder. He felt slightly angry and suddenly pressed Lu Feng's hand with one hand, pressed and rubbed it hard. He looked at the boy in front of him with a smile on his face, wanting to see his ugly face....