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<h1 class="q-tit"> 1. <a href="javascript:;" class="ques-origin " target="_self"> (2017高二上·安陽(yáng)開學(xué)考) </a> 如圖，在傾角為α的固定光滑斜面上，有一用繩子栓著的長(zhǎng)木板，木板上站著一只貓．已知木板的質(zhì)量是貓的質(zhì)量的 2 倍．當(dāng)繩子突然斷開時(shí)，貓立即沿著板向上跑，以保持其相對(duì)斜面的位置不變．則此時(shí)木板沿斜面下滑的加速度為（　?。?p><img width="210" height="95" src="http://tikupic.21cnjy.com/69/2f/692fa28e86a085cbf7db98b4ca3dd8a9.png" style="max-width:100%;"></p> </h1> <div id="0nq2gpj" class="exam-s"> <span id="eqcz9gw" class="op-item"><span id="duulbc1" class="op-item-nut">A . </span><span id="3ns8vip" class="op-item-meat">1.5gsinα</span></span> <span id="gh0kqky" class="op-item"><span id="zuzj5w0" class="op-item-nut">B . </span><span id="6jzcvuz" class="op-item-meat"><img class="mathml" src="http://math.21cnjy.com/MathMLToImage?mml=%3Cmath+xmlns%3D%22http%3A%2F%2Fwww.w3.org%2F1998%2FMath%2FMathML%22%3E%3Cmrow%3E%3Cmfrac%3E%3Cmi%3Eg%3C%2Fmi%3E%3Cmn%3E2%3C%2Fmn%3E%3C%2Fmfrac%3E%3C%2Fmrow%3E%3C%2Fmath%3E" style="max-width:100%;vertical-align: middle;"> sinα</span></span> <span id="ujds72q" class="op-item"><span id="3yrydve" class="op-item-nut">C . </span><span id="cg8xekz" class="op-item-meat">gsinα</span></span> <span id="qvq73x2" class="op-item"><span id="t2aafpc" class="op-item-nut">D . </span><span id="wa6th97" class="op-item-meat">2gsinα</span></span> </div> </div> </div> </li> </ul> <div style="height:20px;background-color: #fff;margin-top:1px"></div>  <div class="3k6puoa" id="J_ConnectQuestionsdBox"> </div> </div> </div> <div id="0rszgjc" class="g-sd2">  <div style="background:#fff;padding:20px 0;margin-bottom:20px;text-align:center;"> <img src="/question/paper-qrcode?id=5686697" width="140px" height="140px" alt=""> <p style="text-align:center;margin-top: 10px">微信掃碼預(yù)覽、分享更方便</p> </div> <div id="4xj1v2k" class="analyize-extend JV_question__papers"> <h3 class="extend-mt">使用過(guò)本題的試卷</h3> <ul class="extend-mc"> <li> <a href="/paper/view-454002.shtml" target="_blank" title="備考2018年高考物理一輪基礎(chǔ)復(fù)習(xí)：專題11 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