<p class="ql-block">复习</p> <p class="ql-block">练习视频跟乐器</p> <p class="ql-block">练习视频</p> <p class="ql-block">四分休止符引入</p> <p class="ql-block">练习视频</p> <p class="ql-block">练习一</p> <p class="ql-block">练习视频</p> <p class="ql-block">八分休止符引入</p> <p class="ql-block">练习视频</p> <p class="ql-block">练习一</p> <p class="ql-block">练习视频</p> <p class="ql-block">切分音引入</p> <p class="ql-block">练习一</p> <p class="ql-block">练习视频</p> <p class="ql-block">练习二</p> <p class="ql-block">练习视频</p> <p class="ql-block">练习视频</p>