一、填空题１．往脸盆里倒水，会发现脸盆底的深度变──，潜水员从水中观察岸上的树，会发现树的高度变＿２．图１中ＭＮ为空气和水的界面，一束光线从空气入射到界面上Ｏ点，产生了反射和折射，图中①、②、③三条光线．其中光线＿是入射光线，光线──是反射光线，光线── First, fill in the blank 1. When you pour water into the basin, you will find that the depth of the bottom of the basin is changing - divers watching the trees on the shore from the water will find that the height of the tree has changed _2. In Figure 1, MN is the air and water interface, a beam of light from the air incident on the interface O point, resulting in reflection and refraction, in the figure 1,2,3 three rays. Where light _ is incident light, light - is reflected light, light -