满分5 >
高中数学试题 >
如图,动点P在正方体ABCD-A1B1C1D1的对角线BD1上.过点P作垂直于平...
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131101231338008441016/SYS201311012313380084410011_ST/images0.png)
如图,动点P在正方体ABCD-A
1B
1C
1D
1的对角线BD
1上.过点P作垂直于平面BB
1D
1D的直线,与正方体表面相交于M,N.设BP=x,MN=y,则函数y=f(x)的图象大致是( )
A.
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131101231338008441016/SYS201311012313380084410011_ST/images1.png)
B.
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131101231338008441016/SYS201311012313380084410011_ST/images2.png)
C.
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131101231338008441016/SYS201311012313380084410011_ST/images3.png)
D.
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131101231338008441016/SYS201311012313380084410011_ST/images4.png)
考点分析:
相关试题推荐
向量
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131101231338008441016/SYS201311012313380084410010_ST/0.png)
,
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131101231338008441016/SYS201311012313380084410010_ST/1.png)
,对任意t∈R,恒有
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131101231338008441016/SYS201311012313380084410010_ST/2.png)
,下列四个结论中判断正确的是( )
A.
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131101231338008441016/SYS201311012313380084410010_ST/3.png)
∥
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131101231338008441016/SYS201311012313380084410010_ST/4.png)
B.
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131101231338008441016/SYS201311012313380084410010_ST/5.png)
∥
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131101231338008441016/SYS201311012313380084410010_ST/6.png)
C.
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131101231338008441016/SYS201311012313380084410010_ST/7.png)
⊥
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131101231338008441016/SYS201311012313380084410010_ST/8.png)
D.
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131101231338008441016/SYS201311012313380084410010_ST/9.png)
⊥
查看答案
如图,一个简单空间几何体的三视图其主视图与侧视图都是边长为2的正三角形,俯视图轮廓为正方形,则此几何体的表面积是( )
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131101231338008441016/SYS201311012313380084410009_ST/images0.png)
A.
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131101231338008441016/SYS201311012313380084410009_ST/0.png)
B.12
C.
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131101231338008441016/SYS201311012313380084410009_ST/1.png)
D.8
查看答案
在棱长为a的正方体ABCD-A
1B
1C
1D
1中,长度为b(b为定值且b<a)的线段EF在面对角线A
1C
1上滑动,G是棱BB
1上的动点(G不与端点B
1、B重合),下列四个判断:
①三棱柱ABC-A
1B
1C
1的表面积是正方体ABCD-A
1B
1C
1D
1表面积的一半;
②三棱锥B
1-DEF的体积不变;
③三棱锥G-ADD
1的体积等于三棱锥B-A
1AD
1的体积;
④正方体ABCD-A
1B
1C
1D
1外接球的表面积是3πa
2.
其中正确命题的个数是( )
A.4个
B.3个
C.2个
D.1个
查看答案
函数f(x)=lgx-sinx在区间(0,10]上的零点个数为( )
A.1
B.2
C.3
D.4
查看答案
直线l的方程是:
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131101231338008441016/SYS201311012313380084410006_ST/0.png)
,圆C的方程是:
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131101231338008441016/SYS201311012313380084410006_ST/1.png)
(t>0且t为参数),则直线l与圆C的位置关系是( )
A.相离
B.相切
C.相交
D.相交或相
查看答案