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如图,已知⊙O是以数轴的原点O为圆心,半径为1的圆,∠AOB=45°,点P(P与...
如图,已知⊙O是以数轴的原点O为圆心,半径为1的圆,∠AOB=45°,点P(P与O不重合)在数轴上运动,若过点P且与OA平行的直线与⊙O有公共点,设点P所表示的实数为x,则x的取值范围是( )
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131101190123089461096/SYS201311011901230894610007_ST/images0.png)
A.-1≤x<0或0<x≤1
B.
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C.
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D.
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考点分析:
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如图,已知双曲线y=
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(k<0)经过直角三角形OAB斜边OA的中点D,且与直角边AB相交于点C.若点A的坐标为(-6,4),则△AOC的面积为( )
A.12
B.9
C.6
D.4
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二元一次方程组
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的解是( )
A.
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B.
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C.
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D.
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如图所示,河堤横断面迎水坡AB的坡比是1:
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,堤高BC=5cm,则坡面AB的长是( )
A.10m
B.
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m
C.15m
D.
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m
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已知两圆相外切,连心线长度是10厘米,其中一圆的半径为6厘米,则另一圆的半径是( )
A.16厘米
B.10厘米
C.6厘米
D.4厘米
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A.平移
B.旋转
C.对称
D.位似
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