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某人从A地向B地打长途电话6分钟,按通话时间收费,3分钟以内收费2.4元,每加1...
某人从A地向B地打长途电话6分钟,按通话时间收费,3分钟以内收费2.4元,每加1分钟加收1元(不足1分钟按1分钟收费),则表示电话费y(元)与通话时间x(分)之间的函数关系的图象如图所示,正确的是( )
A.
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131022164026420266532/SYS201310221640264202665009_ST/images0.png)
B.
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131022164026420266532/SYS201310221640264202665009_ST/images1.png)
C.
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131022164026420266532/SYS201310221640264202665009_ST/images2.png)
D.
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131022164026420266532/SYS201310221640264202665009_ST/images3.png)
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