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二次函数y=ax2+bx+c的图象如图所示,反比例函数y=与正比例函数y=(b+...
二次函数y=ax
2+bx+c的图象如图所示,反比例函数y=
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131101193857253572384/SYS201311011938572535723008_ST/0.png)
与正比例函数y=(b+c)x在同一坐标系中的大致图象可能是( )
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131101193857253572384/SYS201311011938572535723008_ST/images1.png)
A.
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131101193857253572384/SYS201311011938572535723008_ST/images2.png)
B.
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131101193857253572384/SYS201311011938572535723008_ST/images3.png)
C.
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131101193857253572384/SYS201311011938572535723008_ST/images4.png)
D.
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131101193857253572384/SYS201311011938572535723008_ST/images5.png)
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B.平均数增加,中位数不变
C.平均数不变,中位数增加
D.平均数和中位数都增加
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如图是由几个相同的小正方体搭成的一个几何体,它的左视图是( )
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131101193857253572384/SYS201311011938572535723006_ST/images0.png)
A.
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131101193857253572384/SYS201311011938572535723006_ST/images1.png)
B.
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C.
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D.
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如图,矩形ABOC的面积为3,反比例函数y=
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131101193857253572384/SYS201311011938572535723005_ST/0.png)
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![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131101193857253572384/SYS201311011938572535723005_ST/images1.png)
A.3
B.-1.5
C.-3
D.-6
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![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131101193857253572384/SYS201311011938572535723004_ST/images0.png)
A.AB∥DC
B.AB=DC
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如图所示,已知AB∥CD,∠A=50°,∠C=∠E.则∠C等于( )
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131101193857253572384/SYS201311011938572535723003_ST/images0.png)
A.20°
B.25°
C.30°
D.40°
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