已知等差数列{an}中,|a3|=|a9|,公差d<0;Sn是数列{an}的前n 发布时间:2017-04-29 13:00 │ 来源:www.tikuol.com 题型:选择题 问题: 已知等差数列{an}中,|a3|=|a9|,公差d<0;Sn是数列{an}的前n项和,则( )A.S5>S6B.S5<S6C.S6=0D.S5=S6
题型:选择题 Do you know the man______? [ ]A. that I spoke B. I spoke toC. to who I spoke D. whom I spoke 查看答案