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(2002•辽宁)Rt△ABC中,∠C=90°,∠A=30°,b=,则此三角形外...
(2002•辽宁)Rt△ABC中,∠C=90°,∠A=30°,b=
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,则此三角形外接圆半径为( )
A.
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B.2
C.
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D.4
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