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Câu 2929. Cal lệch là do... hoặc có di lệch thứ phát trong bột mà không phát hiện được.• A. Kết xương không vững.• B. Do các cơ co kéo trong khi vận động.• C. Do nắn chinh giải phẫu không tốt.• D. Do vận động sớm.• E. Tất cả đúng.

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