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题目如图1,在△ABC中,∠A=60°,AB>AC,点O是外心,两条高BE,CF交于H点。点M,N分别在线段BH,HF
The problem is shown in Figure 1. In △ABC, ∠A=60°, AB>AC, point O is the heart, two high BE, and CF is intersected at H. Points M, N are in line BH, HF respectively