单选题:一衍射光栅,用波长为A的单色平行光垂直照射,在屏上只能出现零级和一级主极大,欲使屏幕上出现更高级次的主极大,则应该( 题目分类:勘察设计注册 题目类型:单选题 查看权限:VIP 题目内容: 一衍射光栅,用波长为A的单色平行光垂直照射,在屏上只能出现零级和一级主极大,欲使屏幕上出现更高级次的主极大,则应该( )。 A. (A)将光栅向靠近屏幕的方向移动 B. (B)将光栅向远离屏幕的方向移动 C. (C)换一个光栅常数较小的光栅 D. (D)换一个光栅常数较大的光栅 参考答案: 答案解析:
We learn from Paragraph 1that____________. [A]ESPNhas its of We learn from Paragraph 1that____________. [A]ESPNhas its offices around the wo 分类:勘察设计注册 题型:单选题 查看答案
What happened to Johnstoneand Dolby at a Singapore airport? What happened to Johnstoneand Dolby at a Singapore airport?A.Theywent into the w 分类:勘察设计注册 题型:单选题 查看答案
What did the man do everySunday? What did the man do everySunday?A.Hewas taken to church three time B.Hestayed at 分类:勘察设计注册 题型:单选题 查看答案
Why did the man go toschool on foot? Why did the man go toschool on foot?A.Nobus ran in that directio B.Theschool was 分类:勘察设计注册 题型:单选题 查看答案
最高人民法院《关于民事诉讼证据的若干规定》(以下简称证据规定)颁行后,各界反响热烈。法制月刊的记者小赵就《证据规定》的相 最高人民法院《关于民事诉讼证据的若干规定》(以下简称证据规定)颁行后,各界反响热烈。法制月刊的记者小赵就《证据规定》的相关问题采访了不同层面的读者。以下是读者对 分类:勘察设计注册 题型:单选题 查看答案