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(2009•绵阳)一个钢管放在V形架内,如图是其截面图,O为钢管的圆心.如果钢管...
(2009•绵阳)一个钢管放在V形架内,如图是其截面图,O为钢管的圆心.如果钢管的半径为25cm,∠MPN=60°,则OP=( )
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A.50cm
B.25
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cm
C.
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cm
D.50
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cm
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