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小华拿一个矩形木框在阳光下玩,矩形木框在地面上形成的投影不可能的是( ) A. ...
小华拿一个矩形木框在阳光下玩,矩形木框在地面上形成的投影不可能的是( )
A.
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131103001117742895051/SYS201311030011177428950005_ST/images0.png)
B.
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131103001117742895051/SYS201311030011177428950005_ST/images1.png)
C.
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131103001117742895051/SYS201311030011177428950005_ST/images2.png)
D.
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131103001117742895051/SYS201311030011177428950005_ST/images3.png)
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下列图中能说明∠1>∠2的是( )
A.
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131103001117742895051/SYS201311030011177428950002_ST/images0.png)
B.
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131103001117742895051/SYS201311030011177428950002_ST/images1.png)
C.
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131103001117742895051/SYS201311030011177428950002_ST/images2.png)
D.
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如图,在直角坐标系中,卡片盖住的数可能是( )
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A.(2,3)
B.(-2,-1)
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如果□+2=0,那么“□”内应填的实数是( )
A.-2
B.-
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131103001117742895051/SYS201311030011177428950000_ST/0.png)
C.
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131103001117742895051/SYS201311030011177428950000_ST/1.png)
D.2
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