—“Les Miserables” is a wonderful film.—_______. I've never seen such a moving film before.
A:I'm afraid that's not true
B:I don't like it at all
C:I'm not sure if you are right
D:I think so, too.
如图所示,一束光在空气和玻璃两种介质分界面上同时发生反射和折射,其中____ 是折射光线,反射角等于____ 。