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【简答题】
As shown in the Fig.4 , △ABC is a right with BC=2 AB=2. E is the midpoint of BC. Form. BF from B perpendicular to AE. BF intersects with AE and AC at Pand Frespectively. Then CF=____. (英汉小字典:perpendicular垂直;intersect相交)
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刷刷题刷刷变学霸