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过抛物线y2=4x的焦点的直线,依次交抛物线与圆x2+y2-2x=0于点A,B,...
过抛物线y
2=4x的焦点的直线,依次交抛物线与圆x
2+y
2-2x=0于点A,B,C,D,则|AB|•|CD|=( )
A.1
B.2
C.4
D.
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