满分5 >
高中数学试题 >
下列四个正方体图形中,A、B为正方体的两个顶点,M、N、P分别为其所在棱的中点,...
下列四个正方体图形中,A、B为正方体的两个顶点,M、N、P分别为其所在棱的中点,能得出AB∥平面MNP的图形的序号是( )
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131101224802345908767/SYS201311012248023459087009_ST/images0.png)
A.①③
B.①④
C.②③
D.②④
考点分析:
相关试题推荐
设抛物线y
2=8x的焦点为F,准线为l,P为抛物线上一点,PA⊥l,A为垂足.如果直线AF的斜率为
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131101224802345908767/SYS201311012248023459087008_ST/0.png)
,那么|PF|=( )
A.
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131101224802345908767/SYS201311012248023459087008_ST/1.png)
B.8
C.
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131101224802345908767/SYS201311012248023459087008_ST/2.png)
D.16
查看答案
函数f(x)=ax
2+3ax+1,若f(x)>f′(x)对一切x∈R恒成立,则实数a的取值范围是( )
A.a<
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131101224802345908767/SYS201311012248023459087007_ST/0.png)
B.a≥0
C.0<a<
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131101224802345908767/SYS201311012248023459087007_ST/1.png)
D.0≤a<
查看答案
直线l
1:x+2y-2=0与直线l
2:ax+y-a=0交于点P,l
1与y轴交于点A,l
2与x轴交于点B,若A,B,P,O四点在同一圆周上(其中O为坐标原点),则实数a的值是( )
A.2
B.-2
C.
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131101224802345908767/SYS201311012248023459087006_ST/0.png)
D.
查看答案
已知双曲线
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131101224802345908767/SYS201311012248023459087005_ST/0.png)
的一条渐近线方程是
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131101224802345908767/SYS201311012248023459087005_ST/1.png)
,它的一个焦点在抛物线y
2=24x的准线上,则双曲线的方程为( )
A.
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131101224802345908767/SYS201311012248023459087005_ST/2.png)
B.
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131101224802345908767/SYS201311012248023459087005_ST/3.png)
C.
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131101224802345908767/SYS201311012248023459087005_ST/4.png)
D.
查看答案
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131101224802345908767/SYS201311012248023459087004_ST/images0.png)
如图,△ABC为正三角形,AA
1∥BB
1∥CC
1,CC
1⊥平面ABC,且3AA
1=
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131101224802345908767/SYS201311012248023459087004_ST/0.png)
=CC
1=AB,则多面体ABC-A
1B
1C
1的正视图是( )
A.
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131101224802345908767/SYS201311012248023459087004_ST/images2.png)
B.
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131101224802345908767/SYS201311012248023459087004_ST/images3.png)
C.
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131101224802345908767/SYS201311012248023459087004_ST/images4.png)
D.
查看答案