10.
如图,在△ABC中,AB=5,BC=3,AC=4,点E,F分别是AB,BC的中点.以下结论错误的是( )
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| A. | △ABC是直角三角形 | B. | AF是△ABC的中位线 | ||
| C. | EF是△ABC的中位线 | D. | △BEF的周长为6 |