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一个几何体由一些小正方体摆成,其主(正)视图与左视图如图所示.其俯视图不可能是(...
一个几何体由一些小正方体摆成,其主(正)视图与左视图如图所示.其俯视图不可能是( )
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131101190919034393335/SYS201311011909190343933005_ST/images0.png)
A.
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131101190919034393335/SYS201311011909190343933005_ST/images1.png)
B.
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131101190919034393335/SYS201311011909190343933005_ST/images2.png)
C.
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131101190919034393335/SYS201311011909190343933005_ST/images3.png)
D.
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131101190919034393335/SYS201311011909190343933005_ST/images4.png)
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A.30x-8=31x+26
B.30x+8=31x+26
C.30x-8=31x-26
D.30x+8=31x-26
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如图,在数轴上表示到原点的距离为3个单位的点有( )
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A.D点
B.A点
C.A点和D点
D.B点和C点
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如图,C为线段BD上一点,BC=3,CD=2.△ABC、△ECD均为正三角形,AD交CE于F,则S
△ACF:S
△DEF的值为( )
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131101190919034393335/SYS201311011909190343933002_ST/images0.png)
A.4:3
B.9:5
C.9:4
D.3:2
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如图所示的图案中既是轴对称图形又是中心对称图形的是( )
A.
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131101190919034393335/SYS201311011909190343933001_ST/images0.png)
B.
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131101190919034393335/SYS201311011909190343933001_ST/images1.png)
C.
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131101190919034393335/SYS201311011909190343933001_ST/images2.png)
D.
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-3的相反数是( )
A.
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131101190919034393335/SYS201311011909190343933000_ST/0.png)
B.
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131101190919034393335/SYS201311011909190343933000_ST/1.png)
C.3
D.-3
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