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一个几何体的三视图如图所示,则这个几何体的表面积为( ) A. B. C. D....
一个几何体的三视图如图所示,则这个几何体的表面积为( )
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131025124443628297906/SYS201310251244436282979006_ST/images0.png)
A.
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131025124443628297906/SYS201310251244436282979006_ST/0.png)
B.
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131025124443628297906/SYS201310251244436282979006_ST/1.png)
C.
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131025124443628297906/SYS201310251244436282979006_ST/2.png)
D.9
考点分析:
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已知M,N是不等式组
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131025124443628297906/SYS201310251244436282979004_ST/0.png)
所表示的平面区域内的两个不同的点,则|MN|的最大值是( )
A.
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B.
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131025124443628297906/SYS201310251244436282979004_ST/2.png)
C.
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D.
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设平面向量
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131025124443628297906/SYS201310251244436282979003_ST/0.png)
=(1,2),
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131025124443628297906/SYS201310251244436282979003_ST/1.png)
=(-2,y),若
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131025124443628297906/SYS201310251244436282979003_ST/2.png)
∥
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![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131025124443628297906/SYS201310251244436282979003_ST/4.png)
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|等于( )
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![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131025124443628297906/SYS201310251244436282979003_ST/6.png)
D.
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