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如图,点A,B分别在射线OM,ON上,C,D分别是线段OA和OB上的点,以OC,...
如图,点A,B分别在射线OM,ON上,C,D分别是线段OA和OB上的点,以OC,OD为邻边作平行四边形OCED,下面给出三种作法的条件:①取OC=
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131103102555423507784/SYS201311031025554235077023_ST/0.png)
OA,OD=
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131103102555423507784/SYS201311031025554235077023_ST/1.png)
OB;②取OC=
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131103102555423507784/SYS201311031025554235077023_ST/2.png)
OA,OD=
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131103102555423507784/SYS201311031025554235077023_ST/3.png)
OB;③取OC=
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131103102555423507784/SYS201311031025554235077023_ST/4.png)
OA,OD=
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131103102555423507784/SYS201311031025554235077023_ST/5.png)
OB.能使点E落在阴影区域内的作法有( )
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131103102555423507784/SYS201311031025554235077023_ST/images6.png)
A.①
B.①②
C.①②③
D.②③
考点分析:
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