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width="432" height="120" src="http://tikupic.21cnjy.com/2024/05/12/72/7f/727f5ffdbab2478362b9036858654e6f.png" style="max-width:100%;"></p> </h1> <div id="7j20bv5" class="exam-s"> <span id="3jv1k2b" class="op-item"><span id="8qntspj" class="op-item-nut">A . </span><span id="teqwj5k" class="op-item-meat">甲：用大小不同的力敲擊鼓面，紙屑跳動的幅度不同，說明音調與頻率有關</span></span> <span id="lknctjs" class="op-item"><span id="2dir2hy" class="op-item-nut">B . </span><span id="g2ip6y7" class="op-item-meat">乙：小麗通過“土電話”能聽到小剛說話，說明聲音傳播不需要介質</span></span> <span id="27ceb68" class="op-item"><span id="ywo7lks" class="op-item-nut">C . </span><span id="p7pgm2f" class="op-item-meat">丙：用力吹細管將它不斷剪短，聽聲音的變化情況，可以探究“響度與振幅的關系”</span></span> <span id="zvf7tlb" class="op-item"><span id="fcvllj3" class="op-item-nut">D . </span><span id="pex20rt" class="op-item-meat">?。菏逛摮呱斐鲎烂娌煌L度，用力撥動，保持鋼尺振幅不變，可以探究“音調與頻率的關系”</span></span> </div> </div> </div> </li> </ul> <div style="height:20px;background-color: #fff;margin-top:1px"></div>  <div 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