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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=( )...
正方形ABCD中,E、F分别为AB、BC的中点,AF与DE相交于点O,则
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131101191045941988777/SYS201311011910459419887008_ST/0.png)
=( )
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131101191045941988777/SYS201311011910459419887008_ST/images1.png)
A.
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131101191045941988777/SYS201311011910459419887008_ST/1.png)
B.
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131101191045941988777/SYS201311011910459419887008_ST/2.png)
C.
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131101191045941988777/SYS201311011910459419887008_ST/3.png)
D.
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131101191045941988777/SYS201311011910459419887008_ST/4.png)
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2+bx+c=0(a≠0)满足a+b+c=0,那么我们称这个方程为“凤凰”方程.已知ax
2+bx+c=0(a≠0)是“凤凰”方程,且有两个相等的实数根,则下列结论正确的是( )
A.a=c
B.a=b
C.b=c
D.a=b=c
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下列四个三角形中,与图中的三角形相似的是( )
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A.
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131101191045941988777/SYS201311011910459419887006_ST/images1.png)
B.
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C.
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131101191045941988777/SYS201311011910459419887006_ST/images3.png)
D.
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如图,以▱ABCD对角线的交点为坐标原点,以平行于AD边的直线为x轴,建立平面直角坐标系.若点D的坐标为(3,2),则点B的坐标为( )
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如图,CD切⊙O于B,CO的延长线交⊙O于A,若∠C=36°,则∠ABD的度数是( )
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如图,第四象限的角平分线OM与反比例函数y=
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131101191045941988777/SYS201311011910459419887003_ST/0.png)
(k≠0)的图象交于点A,已知OA=
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131101191045941988777/SYS201311011910459419887003_ST/1.png)
,则该函数的解析式为( )
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131101191045941988777/SYS201311011910459419887003_ST/images2.png)
A.y=
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131101191045941988777/SYS201311011910459419887003_ST/2.png)
B.y=-
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131101191045941988777/SYS201311011910459419887003_ST/3.png)
C.y=
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131101191045941988777/SYS201311011910459419887003_ST/4.png)
D.y=-
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