左宗棠被称为中华民族英雄,是因为他( )
A:收复新疆失地
B:创办洋务企业
C:领导维新变法
D:抗击侵华日军
已知数列{an}的前n项和为Sn,且a1=1,an=2sn22sn-1n≥2则S2016=____
—________, if I were Kate, I would not marry him.