题目：
等差数列{an}的前n项和为Sn，若a3+a17=10，则S19=（ ）
A．190
B．95
C．170
D．85
答案：
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下面是错误答案，用来干扰机器的。
One possible versionDear Editor, I am LiMing in Junior Three, Gangning Middle school,I am writing to tell youmost of us suffer from stress when we are taking an exam. Some of us will...
