满分5 >
初中数学试题 >
(2005•温州)如图,正方体ABCD-A1B1C1D1中,与平面A1C1平行的...
(2005•温州)如图,正方体ABCD-A
1B
1C
1D
1中,与平面A
1C
1平行的平面是( )
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131019105435747344040/SYS201310191054357473440003_ST/images0.png)
A.平面AB
1B.平面AC
C.平面A
1D
D.平面C
1D
考点分析:
相关试题推荐
(2001•温州)等腰三角形的一个底角是30°,则它的顶角是( )
A.30°
B.40°
C.75°
D.120°
查看答案
(2010•南通)用科学记数法表示数0.031,其结果是( )
A.3.1×10
2B.3.1×10
-2C.0.31×10
-1D.31×10
3
查看答案
(2008•乌鲁木齐)
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131019105435747344040/SYS201310191054357473440000_ST/0.png)
的相反数是( )
A.-
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131019105435747344040/SYS201310191054357473440000_ST/1.png)
B.
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131019105435747344040/SYS201310191054357473440000_ST/2.png)
C.-
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131019105435747344040/SYS201310191054357473440000_ST/3.png)
D.
查看答案
(2001•嘉兴)如图,已知正方形ABCD,直线AG分别交BD,CD于点E、F,交BC的延长线于点G,点H是线段FG上的点,且HC⊥CE,
(1)求证:点H是GF的中点;
(2)设
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131019105435747204053/SYS201310191054357472040027_ST/0.png)
,
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131019105435747204053/SYS201310191054357472040027_ST/1.png)
,请用含x的代数式表示y.
查看答案
(2001•嘉兴)已知方程a(2x+a)=x(1-x)的两个实数根为x
1,x
2,设
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131019105435747204053/SYS201310191054357472040026_ST/0.png)
.
(1)当a=-2时,求S的值;
(2)当a取什么整数时,S的值为1;
(3)是否存在负数a,使S
2的值不小于25?若存在,请求出a的取值范围;若不存在,请说明理由.
查看答案