设数列Sn是等差数列{an}的前n项和,若a3=5,a8=11,则S10=( )A.90 B.80 ... 问题详情:设数列Sn是等差数列{an}的前n项和,若a3=5,a8=11,则S10=()A.90 B.80 C.100 D.120【回答】B 知识点:数列题型:选择题...