Sáng kiến kinh nghiệm CÁCH đặt ĐÚNG các NGÓN TAY TRÊN bàn PHÍM và QUY tắc gõ các PHÍM TRÊN các HÀNG PHÍM
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CÁCH ĐẶT ĐÚNG CÁC NGÓN TAY TRÊN BÀN PHÍM
VÀ QUY TẮC GÕ CÁC PHÍM TRÊN CÁC HÀNG PHÍM.
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