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(2009•吉林)如图,△OAB的顶点B的坐标为(4,0),把△OAB沿x轴向右...
(2009•吉林)如图,△OAB的顶点B的坐标为(4,0),把△OAB沿x轴向右平移得到△CDE.如果CB=1,那么OE的长为
.
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