如图,△ABC是格点(横、纵坐标都为整数的点)三角形,请在图中画出与△ABC全等的一个格点三角形.
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某种品牌的同一种洗衣粉有A、B、C三种袋装包装,每袋分别装有400克、300克、200克洗衣粉,售价分别为3.5元、2.8元、1.9元.A、B、C三种包装的洗衣粉每袋包装费用(含包装袋成本)分别为0.8元、0.6元、0.5元.厂家销售A、B、C三种包装的洗衣粉各1200千克,获得利润最大的是( )
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B.B种包装的洗衣粉
C.C种包装的洗衣粉
D.三种包装的都相同
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正方形ABCD中,E、F分别为AB、BC的中点,AF与DE相交于点O,则
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=( )
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A.
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131101194107837119053/SYS201311011941078371190010_ST/1.png)
B.
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131101194107837119053/SYS201311011941078371190010_ST/2.png)
C.
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131101194107837119053/SYS201311011941078371190010_ST/3.png)
D.
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如图,在直角坐标系中,将矩形OABC沿OB对折,使点A落在A
1处,已知OA=
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,AB=1,则点A
1的坐标是( )
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A.(
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)
B.(
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)
C.(
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)
D.(
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)
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为了改善住房条件,小亮的父母考察了某小区的A、B两套楼房,A套楼房在第3层楼,B套楼房在第5层楼,B套楼房的面积比A套楼房的面积大24平方米,两套楼房的房价相同,第3层楼和第5层楼的房价分别是平均价的1.1倍和0.9倍.为了计算两套楼房的面积,小亮设A套楼房的面积为x平方米,B套楼房的面积为y平方米,根据以上信息列出了下列方程组.其中正确的是( )
A.
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B.
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C.
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D.
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若x+
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131101194107837119053/SYS201311011941078371190007_ST/0.png)
=3,求
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的值是( )
A.
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131101194107837119053/SYS201311011941078371190007_ST/2.png)
B.
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C.
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D.
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