"62.5/125μm"多模光纤的62.5/125μm指的是()。 A.光纤内外径 发布时间:2017-08-07 05:29 │ 来源:www.tikuol.com 题型:单项选择题 问题: "62.5/125μm"多模光纤的62.5/125μm指的是()。A.光纤内外径B.光纤可传输的光波波长C.光缆内外径D.光缆可传输的光波波长
题型:单项选择题 已知数列{an}是首项为1,公比为q(q>0)的等比数列,并且2a1,a3,a2成等差数列。(1)求q的值;(2)若数列{bn}满足bn=an+n,求数列{bn}的前n项和Tn。 查看答案
题型:单项选择题 ___Nobel Prize ___ Literature 2012 is awarded to Chinese writer Mo Yan, which inspires billions of Chinese people.A./; inB.The; forC.A; onD.The; of 查看答案