I couldn't do my homework with all that 发布时间:2017-04-14 19:14 │ 来源:www.tikuol.com 题型:选择题 问题: I couldn't do my homework with all that noiseA.to go onB.goes onC.went onD.going on
题型:选择题 当光从一种介质射向另一种介质时,下列说法中正确的是 ( )A.一定会发生偏折B.发生折射时,折射角一定小于入射角C.反射和折射不会同时发生D.只要光进入另一种介质,速度就一定改变 查看答案