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<div id="k2aeis8" class="q-mc"> <h1 class="q-tit"> 1. <a href="/paper/view-5052967.shtml" class="ques-origin a-pointer" target="_blank"> (2021高一上·高郵期中) </a> 一質(zhì)點(diǎn)做勻加速直線運(yùn)動(dòng)，先后經(jīng)過a、b兩點(diǎn)時(shí)的速度分別為 <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%3Ev%3C%2Fmi%3E%3Cmn%3E2%3C%2Fmn%3E%3C%2Fmfrac%3E%3C%2Fmrow%3E%3C%2Fmath%3E" style="max-width:100%;vertical-align: middle;"> 和v，所用時(shí)間是t，下列說法正確的是（　?。? </h1> <div id="ks8kau6" class="exam-s"> <span id="kie4uaw" class="op-item"><span id="kqiqms6" class="op-item-nut">A . </span><span id="g88woa2" class="op-item-meat">物體的加速度大小為 <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%3Cmrow%3E%3Cmn%3E3%3C%2Fmn%3E%3Cmi%3Ev%3C%2Fmi%3E%3C%2Fmrow%3E%3Cmrow%3E%3Cmn%3E2%3C%2Fmn%3E%3Cmi%3Et%3C%2Fmi%3E%3C%2Fmrow%3E%3C%2Fmfrac%3E%3C%2Fmrow%3E%3C%2Fmath%3E" style="max-width:100%;vertical-align: middle;"></span></span> <span id="4sc6os2" class="op-item"><span id="gc2mg64" class="op-item-nut">B . </span><span id="ek4cwyy" class="op-item-meat">后一半時(shí)間內(nèi)發(fā)生的位移是前一半時(shí)間內(nèi)位移的2倍</span></span> <span id="yaoqq86" class="op-item"><span id="26cm0ge" class="op-item-nut">C . </span><span id="wwgaqek" class="op-item-meat">在 <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%3Et%3C%2Fmi%3E%3Cmn%3E2%3C%2Fmn%3E%3C%2Fmfrac%3E%3C%2Fmrow%3E%3C%2Fmath%3E" style="max-width:100%;vertical-align: middle;"> 時(shí)刻的速率是 <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%3Cmrow%3E%3Cmn%3E3%3C%2Fmn%3E%3Cmi%3Ev%3C%2Fmi%3E%3C%2Fmrow%3E%3Cmn%3E4%3C%2Fmn%3E%3C%2Fmfrac%3E%3C%2Fmrow%3E%3C%2Fmath%3E" style="max-width:100%;vertical-align: middle;"></span></span> <span id="ck8aomw" class="op-item"><span id="gqkowma" class="op-item-nut">D . </span><span id="w8uuym6" class="op-item-meat">經(jīng)過ab中點(diǎn)時(shí)的速率是 <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%3Cmrow%3E%3Cmn%3E5%3C%2Fmn%3E%3Cmi%3Ev%3C%2Fmi%3E%3C%2Fmrow%3E%3Cmn%3E8%3C%2Fmn%3E%3C%2Fmfrac%3E%3C%2Fmrow%3E%3C%2Fmath%3E" style="max-width:100%;vertical-align: middle;"></span></span> </div> </div> </div> </li> </ul> <div style="height:20px;background-color: #fff;margin-top:1px"></div>  <div class="e88qiuq" id="J_ConnectQuestionsdBox"> </div> 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