满分5 >
高中数学试题 >
某企业要从某下属的6个工厂中抽调8名工程技术人员组成课题攻关小组,每厂至少调1人...
某企业要从某下属的6个工厂中抽调8名工程技术人员组成课题攻关小组,每厂至少调1人,则这8个名额的分配方案有 种.
考点分析:
相关试题推荐
(1-2x)
6的展开式中,x
2的系数为
;其所有项的系数之和为
.
查看答案
如图,在直三棱柱A
1B
1C
1-ABC中,
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131023214036230867333/SYS201310232140362308673007_ST/0.png)
,AB=AC=A
1A=1,已知G与E分别是棱A
1B
1和CC
1的中点,D与F分别是线段AC与AB上的动点(不包括端点).若GD⊥EF,则线段DF的长度的取值范围是( )
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131023214036230867333/SYS201310232140362308673007_ST/images1.png)
A.[
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131023214036230867333/SYS201310232140362308673007_ST/1.png)
,1)
B.[
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131023214036230867333/SYS201310232140362308673007_ST/2.png)
,2)
C.[1,
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131023214036230867333/SYS201310232140362308673007_ST/3.png)
)
D.[
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131023214036230867333/SYS201310232140362308673007_ST/4.png)
,
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131023214036230867333/SYS201310232140362308673007_ST/5.png)
)
查看答案
已知f(x)是R上的偶函数,且f(1)=0,g(x)是R上的奇函数,且对于x∈R,都有g(x)=f(x-1),则f(2009)的值是( )
A.0
B.1
C.-1
D.2
查看答案
△ABC中,a,b,c分别是内角A,B,C的对边,且cos 2B+3cos(A+C)+2=0,b=
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131023214036230867333/SYS201310232140362308673005_ST/0.png)
,则c:sin C等于( )
A.3:1
B.
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131023214036230867333/SYS201310232140362308673005_ST/1.png)
:1
C.
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131023214036230867333/SYS201310232140362308673005_ST/2.png)
:1
D.2:1
查看答案