一入射光线与法线的夹角为60°,则反射角为;若入射角增大10°,则反射光线与入射 发布时间:2017-05-09 07:19 │ 来源:www.tikuol.com 题型:填空题 问题: 一入射光线与法线的夹角为60°,则反射角为 ;若入射角增大10°,则反射光线与入射光线的夹角为 。
题型:填空题 In my opinion, life in the twentyfirst century is much easier than . [ ]A. that used to be B. it is used to C. it was used to D. it used to be 查看答案