题目内容

If the ratio of the degree of exterior angleof ∠A,∠B and ∠C

 that are in the triangleABC is 5:4:3,then the ratio of the degree

of ∠A,∠B and ∠C is (    )

A、5:4:3     B、3:4:5     C、1:2:3     D3:2:1

 

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