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(2002•荆门)某市为了鼓励节约用水,按以下规定收水费:(1)每户每月用水量不...
(2002•荆门)某市为了鼓励节约用水,按以下规定收水费:(1)每户每月用水量不超过20m
3,则每立方米水费为1.2元,(2)每户用水量超过20m
3,则超过的部分每立方米水费2元,设某户一个月所交水费为y(元),用水量为x(m
3),则y与x的函数关系用图象表示为( )
A.
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131021232523375156973/SYS201310212325233751569018_ST/images0.png)
B.
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131021232523375156973/SYS201310212325233751569018_ST/images1.png)
C.
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131021232523375156973/SYS201310212325233751569018_ST/images2.png)
D.
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131021232523375156973/SYS201310212325233751569018_ST/images3.png)
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