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不等式组的解集在数轴上表示正确的是( ) A. B. C. D.
不等式组
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的解集在数轴上表示正确的是( )
A.
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131022164825770685897/SYS201310221648257706858006_ST/images1.png)
B.
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131022164825770685897/SYS201310221648257706858006_ST/images2.png)
C.
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131022164825770685897/SYS201310221648257706858006_ST/images3.png)
D.
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131022164825770685897/SYS201310221648257706858006_ST/images4.png)
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A.
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B.
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C.
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131022164825770685897/SYS201310221648257706858005_ST/2.png)
D.
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使分式
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有意义的x的取值范围是( )
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B.x≤
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131022164825770685897/SYS201310221648257706858004_ST/2.png)
C.x>
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D.x≠
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某反比例函数的图象经过点(-2,3),则此函数图象也经过点( )
A.(2,-3)
B.(-3,-3)
C.(2,3)
D.(-4,6)
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方程x
2+x-1=0的根是( )
A.1-
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131022164825770685897/SYS201310221648257706858002_ST/0.png)
B.
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131022164825770685897/SYS201310221648257706858002_ST/1.png)
C.-1+
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131022164825770685897/SYS201310221648257706858002_ST/2.png)
D.
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下列各图是选自历届世博会徽中的图案,其中是中心对称图形的是( )
A.
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131022164825770685897/SYS201310221648257706858001_ST/images0.png)
B.
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131022164825770685897/SYS201310221648257706858001_ST/images1.png)
C.
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131022164825770685897/SYS201310221648257706858001_ST/images2.png)
D.
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