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下图是用纸叠成的生活图案,其中属于轴对称图形的是(用序号表示) .
下图是用纸叠成的生活图案,其中属于轴对称图形的是(用序号表示)
.
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131022161208086032249/SYS201310221612080860322011_ST/images0.png)
考点分析:
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已知:直线
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(n为正整数)与两坐标轴围成的三角形面积为S
n,则S
1+S
2+S
3+…+S
2011=( )
A.
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131022161208086032249/SYS201310221612080860322009_ST/1.png)
B.
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131022161208086032249/SYS201310221612080860322009_ST/2.png)
C.
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131022161208086032249/SYS201310221612080860322009_ST/3.png)
D.
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如图,等腰直角△ABC的直角边长为3,P为斜边BC上一点,且BP=1,D为AC上一点,若∠APD=45°,则CD的长为( )
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A.
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131022161208086032249/SYS201310221612080860322008_ST/0.png)
B.
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131022161208086032249/SYS201310221612080860322008_ST/1.png)
C.
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131022161208086032249/SYS201310221612080860322008_ST/2.png)
D.
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如图,点A是直线y=-x+5和双曲线
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131022161208086032249/SYS201310221612080860322007_ST/0.png)
在第一象限的一个交点,过A作∠OAB=∠AOX交x轴于B点,AC⊥x轴,垂足为C,则△ABC的周长为( )
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131022161208086032249/SYS201310221612080860322007_ST/images1.png)
A.
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B.5
C.
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131022161208086032249/SYS201310221612080860322007_ST/2.png)
D.
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如图,已知AB、CD是⊙O的两条直径,且∠AOC=50°,过A作AE∥CD交⊙O于E,则∠AOE的度数为( )
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131022161208086032249/SYS201310221612080860322006_ST/images0.png)
A.65°
B.70°
C.75°
D.80°
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