It’s impossible for us ________there on 发布时间:2017-05-18 01:53 │ 来源:www.tikuol.com 题型:选择题 问题: It’s impossible for us ________there on foot in two hours. A.gettingB.getC.to getD.got
题型:选择题 点P在双曲线x2a2-y2b2=1(a,b>0)上,F1、F2是这条双曲线的两个焦点,∠F1PF2=π2,且△F1PF2的三条边长成等差数列,则此双曲线的离心率等于( )A.3B.4C.5D.6 查看答案