【单选题】【消耗次数：1】
Su H 的球形理论指将松紧带放置在球的上部时，松紧带将向上移动，而在球的下部位置松紧带会产生相反的效果，同理，当调改次关键区区域轮廓时，高度应位于牙龈边缘的根方位置。
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【简答题】
站位_____ ，左手将球向上抛起，同时右臂外旋，使拍面前倾，向右后方引拍。当球从高点下降至高于球网时，击球中上部向右前方发力。第一落点在本方台面。
【简答题】
站位_____ ，左手将球向上抛起，同时右臂内旋，使拍面前倾，向右后方引拍。当球从高点下降至高于球网时，击球中上部向左前方发力，第一落点在本方台面。
【单选题】
当图样按看图方向放置时，标题栏必在图框的（ ）位置。
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