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圆O1:x2+y2-2x=0和圆O2:x2+y2-4y=0的位置关系是( ) A...
圆O1:x2+y2-2x=0和圆O2:x2+y2-4y=0的位置关系是( )
A.相离
B.相交
C.外切
D.内切
考点分析:
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