题目内容

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

 that are in the triangle ABC 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

 

【答案】

 

【解析】略

 

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