A:只有在光的直线传播过程中遵守
B:只有在镜面反射中遵守
C:漫反射不遵守
D:光的直线传播、镜面反射、漫反射都遵循光路可逆性原理
The teachers encourage their students to the problems by themselves, and in this way students can enjoy success.
读我国四大地理区域,回答下列问题.
移栽幼苗时,要尽量带土坨,其主要原因是( )