已知数列{an}是公比q≠1的等比数列,则在①{anan+1};②{an+1-a 发布时间:2017-05-01 16:00 │ 来源:www.tikuol.com 题型:选择题 问题: 已知数列{an}是公比q≠1的等比数列,则在①{anan+1};②{an+1-an};③{an3};④{nan}这四个数列中,等比数列的个数是[ ]A.1 B.2 C.3 D.4
题型:选择题 The English Channel , ______ England from France , is wide enough for her to swim across.A.separatedB.separatesC.is separatesD.separating 查看答案