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在如图所示的棱长为1的正方体中,A、B、C、D、E是正方体的顶点,M是棱CD的中...
在如图所示的棱长为1的正方体中,A、B、C、D、E是正方体的顶点,M是棱CD的中点.动点P从点D出发,沿着D→A→B的路线在正方体的棱上运动,运动到点B停止运动.设点P运动的路程是x,y=PM+PE,则y关于x的函数图象大致为( )
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131101193950832704272/SYS201311011939508327042007_ST/images0.png)
A.
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131101193950832704272/SYS201311011939508327042007_ST/images1.png)
B.
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131101193950832704272/SYS201311011939508327042007_ST/images2.png)
C.
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131101193950832704272/SYS201311011939508327042007_ST/images3.png)
D.
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131101193950832704272/SYS201311011939508327042007_ST/images4.png)
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