下列何種電腦鍵盤最適合於缺乏中間範圍上肢動作(midrange arm movements)控制之兒童使用?
(A).加大型鍵盤 (B).縮小型鍵盤 (C).Dvorak單手鍵盤 (D).具發音功能之鍵盤
答:A 為甚麼? 還有解釋其他三個為甚麼?
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