进一退二法倍投图片

简介：As Smiling Tiger Zhang Xuzhang walked into the classroom with a slight cough, the classroom suddenly became quiet and silent. The reflective lenses were illuminated by the incandescent lamp at the front of the classroom. Rows of students began to flip through the books. They nodded with satisfaction and placed the thermos cups on the podium. On the table, sit down and read the legends of the past and present.