将多个普通光源通过光学系统的准直、滤光面获得的单色强光称为激光。 发布时间:2018-01-26 21:11 │ 来源:www.tikuol.com 题型:判断题 问题: 将多个普通光源通过光学系统的准直、滤光面获得的单色强光称为激光。
题型:判断题 People who eat a balanced diet should be healthier than those who only eat biscuits and hamburgers, ______?A.don’t theyB.do theyC.shouldn’t theyD.should they 查看答案