問題詳情
13. 已知G 為△ ABC 的重心,滿足
,若
= 3 ,
= 5 ,
= 7 ,則
= (T) 。





參考答案
答案:A
難度:困難0.391304
統計:A(27),B(16),C(6),D(5),E(0)
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