[Retracted] Application of Composite Nanomaterials in the Teaching of Piano Touch Technology and Timbre Expressiveness

<table class="table-group" id="tab1"><tr><td><table class="table"><tr><td class="thead-hr" colspan="3"><hr/></td></tr><tr class="thead"><td class="align_left">Option</td><td class="align_center">Subtotal</td><td class="align_center">Proportion (%)</td></tr><tr><td class="thead-hr" colspan="3"><hr/></td></tr><tr><td class="align_left">2–4 hours</td><td class="align_center">10</td><td class="align_center">9.9</td></tr><tr><td class="align_left">5–10 hours</td><td class="align_center">35</td><td class="align_center">34.65</td></tr><tr><td class="align_left">More than 10 hours</td><td class="align_center">54</td><td class="align_center">55.45</td></tr><tr class="table-tr"><td colspan="3"><hr class="tbody-hr"/></td></tr></table></td></tr></table>

<div>Weekly practice time of students after improvement.</div>

Advances in Materials Science and Engineering

tab1

Table 1

Table 1: [Retracted] Application of Composite Nanomaterials in the Teaching of Piano Touch Technology and Timbre Expressiveness 