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一张正方形的纸片,剪去两个一样的小矩形得到一个E”图案,如图所示,设小矩形的长和...
一张正方形的纸片,剪去两个一样的小矩形得到一个E”图案,如图所示,设小矩形的长和宽分别为x,y,剪去部分的面积为20,若2≤x≤10,则y与x的函数图象是( )
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131103000946743497701/SYS201311030009467434977009_ST/images0.png)
A.
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131103000946743497701/SYS201311030009467434977009_ST/images1.png)
B.
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131103000946743497701/SYS201311030009467434977009_ST/images2.png)
C.
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131103000946743497701/SYS201311030009467434977009_ST/images3.png)
D.
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131103000946743497701/SYS201311030009467434977009_ST/images4.png)
考点分析:
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2+bx+c的图象如图所示,则一次函数y=bx+b
2-4ac与反比例函数y=
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在同一坐标系内的图象大致为( )
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A.
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B.
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C.
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D.
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在函数
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131103000946743497701/SYS201311030009467434977007_ST/0.png)
(a为常数)的图象上有三点(x
1,y
1)、(x
2,y
2)、(x
3,y
3)且x
1<x
2<0<x
3,则对应函数值y
1、y
2、y
3的大小关系是( )
A.y
2<y
3<y
1B.y
3<y
2<y
1C.y
1<y
2<y
3D.y
3<y
1<y
2
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如图,圆上有A,B,C,D四点,其中∠BAD=80度.若
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,
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的长度分别为7p,11p,则
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的长度为何( )
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A.4p
B.8p
C.10p
D.15p
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![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131103000946743497701/SYS201311030009467434977005_ST/images0.png)
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cm,则弦CD的长为( )
A.
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131103000946743497701/SYS201311030009467434977005_ST/1.png)
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如图,⊙O是正方形ABCD的外接圆,点P在⊙O上,则∠APB等于( )
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131103000946743497701/SYS201311030009467434977004_ST/images0.png)
A.30°
B.45°
C.55°
D.60°
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