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某个长方体被一个平面所截,得到的几何体的三视图如图所示,则这个几何体的体积为( ...
某个长方体被一个平面所截,得到的几何体的三视图如图所示,则这个几何体的体积为( )
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131025124428475973222/SYS201310251244284759732005_ST/images0.png)
A.4
B.
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131025124428475973222/SYS201310251244284759732005_ST/0.png)
C.
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131025124428475973222/SYS201310251244284759732005_ST/1.png)
D.8
考点分析:
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在下列命题中,
①“
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”是“sinα=1”的充要条件;
②
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的展开式中的常数项为2;
③设随机变量ξ~N(0,1),若P(ξ≥1)=p,则
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.
其中所有正确命题的序号是( )
A.②
B.③
C.②③
D.①③
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在极坐标系中,直线
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131025124428475973222/SYS201310251244284759732003_ST/0.png)
与曲线ρ=2cosθ相交于A,B两点,O为极点,则∠AOB的大小为( )
A.
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B.
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131025124428475973222/SYS201310251244284759732003_ST/2.png)
C.
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D.
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已知向量
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131025124428475973222/SYS201310251244284759732002_ST/0.png)
,
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131025124428475973222/SYS201310251244284759732002_ST/1.png)
.若
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,则实数m的值为( )
A.-3
B.
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C.
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D.
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已知集合M={x|-2<x<3},N={x|lg(x+2)≥0},则M∩N=( )
A.(-2,+∞)
B.(-2,3)
C.(-2,-1]
D.[-1,3)
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i为虚数单位,复数
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131025124428475973222/SYS201310251244284759732000_ST/0.png)
的虚部是( )
A.
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B.
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C.
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D.
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