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如某几何体的正视图(主视图)是平行四边形,侧视图(左视图)和俯视图都是矩形,则几...
如某几何体的正视图(主视图)是平行四边形,侧视图(左视图)和俯视图都是矩形,则几何体的体积为( )
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131023214050376013822/SYS201310232140503760138006_ST/images0.png)
A.6
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131023214050376013822/SYS201310232140503760138006_ST/0.png)
B.9
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131023214050376013822/SYS201310232140503760138006_ST/1.png)
C.12
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131023214050376013822/SYS201310232140503760138006_ST/2.png)
D.18
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131023214050376013822/SYS201310232140503760138006_ST/3.png)
考点分析:
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A.
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B.
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C.
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D.
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已知平面直角坐标系xOy上的区域D由不等式组
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给定.若M(x,y)为D上的动点,点A的坐标为(
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,1),则z=
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•
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的最大值为( )
A.4
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B.3
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131023214050376013822/SYS201310232140503760138004_ST/5.png)
C.4
D.3
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设函数f(x)和g(x)分别是R上的偶函数和奇函数,则下列结论恒成立的是( )
A.f(x)+|g(x)|是偶函数
B.f(x)-|g(x)|是奇函数
C.|f(x)|+g(x)是偶函数
D.|f(x)|-g(x)是奇函数
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若向量
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131023214050376013822/SYS201310232140503760138002_ST/0.png)
,
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131023214050376013822/SYS201310232140503760138002_ST/1.png)
,
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131023214050376013822/SYS201310232140503760138002_ST/2.png)
满足
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131023214050376013822/SYS201310232140503760138002_ST/3.png)
∥
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131023214050376013822/SYS201310232140503760138002_ST/4.png)
且
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131023214050376013822/SYS201310232140503760138002_ST/5.png)
⊥
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131023214050376013822/SYS201310232140503760138002_ST/6.png)
,则
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•(
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+2
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)=( )
A.4
B.3
C.2
D.0
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已知集合A={(x,y)|x,y为实数,且x
2+y
2=1},B={(x,y)|x,y为实数,且y=x},则A∩B的元素个数为( )
A.0
B.1
C.2
D.3
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