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(2009•西藏)小亮每天从家去学校上学行走的路程为900米,某天他从家去上学时...
(2009•西藏)小亮每天从家去学校上学行走的路程为900米,某天他从家去上学时以每分30米的速度行走了450米,为了不迟到他加快了速度,以每分45米的速度行走完剩下的路程,那么小亮行走过的路程S(米)与他行走的时间t(分)之间的函数关系用图象表示正确的是( )
A.
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131021230813816157462/SYS201310212308138161574004_ST/images0.png)
B.
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131021230813816157462/SYS201310212308138161574004_ST/images1.png)
C.
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131021230813816157462/SYS201310212308138161574004_ST/images2.png)
D.
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131021230813816157462/SYS201310212308138161574004_ST/images3.png)
考点分析:
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