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题型:单选题 题类:常考题 难易度:普通

2011年第二十二届“希望杯”全国七年级数学邀请赛

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     D、 3:2:1
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