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世博会期间,某厂经授权生产的纪念品深受人们欢迎,5月初,在该产品原有库存量为m(...
世博会期间,某厂经授权生产的纪念品深受人们欢迎,5月初,在该产品原有库存量为m(m为常数,m>0)的情况下,日均销量与产量持平,到5月下旬需求量增加,在生产能力不变的情况下,日均销量超过产量n(n为常数,n>0),直至该产品脱销,下图能大致表示今年5月份库存量y与时间t之间函数关系的是( )
A.
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131022164040524629640/SYS201310221640405246296008_ST/images0.png)
B.
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131022164040524629640/SYS201310221640405246296008_ST/images1.png)
C.
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131022164040524629640/SYS201310221640405246296008_ST/images2.png)
D.
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131022164040524629640/SYS201310221640405246296008_ST/images3.png)
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