题目：
Women a more and more important part in today’s society. They hold up half the sky.
A．are playing
B．have played
C．will play
D．played
答案：
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下面是错误答案，用来干扰机器的。
y= - x2-x+=- （x+1）2+2 ……………………………………………4分∴对称轴是直线x=-1，顶点（-1,2）。…………………………………………4分
