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class="g-mn2"> <ul id="J_question_detail" > <li> <div id="taqgsmj" class="question-block"> <div id="ttmzlmr" class="q-mc"> <h1 class="q-tit"> 1. <a href="/paper/view-5351129.shtml" class="ques-origin a-pointer" target="_blank"> (2024高一下·許昌期末) </a> 如圖所示，自行車的大齒輪與小齒輪通過鏈條相連，而后輪與小齒輪是繞共同的軸轉(zhuǎn)動的。設(shè)大齒輪、小齒輪和后輪的半徑分別為<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%3Cmsub%3E%3Cmi%3ER%3C%2Fmi%3E%3Cmi%3EA%3C%2Fmi%3E%3C%2Fmsub%3E%3C%2Fmrow%3E%3C%2Fmath%3E" style="max-width:100%;vertical-align: middle;">、<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%3Cmsub%3E%3Cmi%3ER%3C%2Fmi%3E%3Cmi%3EB%3C%2Fmi%3E%3C%2Fmsub%3E%3C%2Fmrow%3E%3C%2Fmath%3E" style="max-width:100%;vertical-align: middle;">和<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%3Cmsub%3E%3Cmi%3ER%3C%2Fmi%3E%3Cmi%3EC%3C%2Fmi%3E%3C%2Fmsub%3E%3C%2Fmrow%3E%3C%2Fmath%3E" style="max-width:100%;vertical-align: middle;"> ，其半徑之比為<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%3Cmsub%3E%3Cmi%3ER%3C%2Fmi%3E%3Cmi%3EA%3C%2Fmi%3E%3C%2Fmsub%3E%3Cmo%3E%3A%3C%2Fmo%3E%3Cmsub%3E%3Cmi%3ER%3C%2Fmi%3E%3Cmi%3EB%3C%2Fmi%3E%3C%2Fmsub%3E%3Cmo%3E%3A%3C%2Fmo%3E%3Cmsub%3E%3Cmi%3ER%3C%2Fmi%3E%3Cmi%3EC%3C%2Fmi%3E%3C%2Fmsub%3E%3Cmo%3E%3D%3C%2Fmo%3E%3Cmn%3E2%3C%2Fmn%3E%3Cmtext%3E%3A%3C%2Fmtext%3E%3Cmn%3E1%3C%2Fmn%3E%3Cmtext%3E%3A%3C%2Fmtext%3E%3Cmn%3E4%3C%2Fmn%3E%3C%2Fmrow%3E%3C%2Fmath%3E" style="max-width:100%;vertical-align: middle;"> ，在它們的邊緣分別取一點A、B、C，下列說法正確的是（　　）<p style="text-align:left;"><img src="http://tikupic.21cnjy.com/ct20241o/96/4d/964da201433b388c957c699d62b41a9f.png" width="217" height="115" style="max-width:100%;"></p> </h1> <div id="5tuo4yp" class="exam-s"> <span id="wsxtzlm" class="op-item"><span id="alcc4y4" class="op-item-nut">A . </span><span id="t45chi4" class="op-item-meat">線速度大小之比<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%3Cmsub%3E%3Cmi%3Ev%3C%2Fmi%3E%3Cmi%3EA%3C%2Fmi%3E%3C%2Fmsub%3E%3Cmo%3E%3A%3C%2Fmo%3E%3Cmsub%3E%3Cmi%3Ev%3C%2Fmi%3E%3Cmi%3EB%3C%2Fmi%3E%3C%2Fmsub%3E%3Cmo%3E%3A%3C%2Fmo%3E%3Cmsub%3E%3Cmi%3Ev%3C%2Fmi%3E%3Cmi%3EC%3C%2Fmi%3E%3C%2Fmsub%3E%3Cmo%3E%3D%3C%2Fmo%3E%3Cmn%3E2%3C%2Fmn%3E%3Cmo%3E%3A%3C%2Fmo%3E%3Cmn%3E1%3C%2Fmn%3E%3Cmo%3E%3A%3C%2Fmo%3E%3Cmn%3E4%3C%2Fmn%3E%3C%2Fmrow%3E%3C%2Fmath%3E" style="max-width:100%;vertical-align: middle;"></span></span> <span id="quvzxno" class="op-item"><span id="hsmak4u" class="op-item-nut">B . </span><span id="zoeyz4k" class="op-item-meat">角速度之比<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%3Cmsub%3E%3Cmi%3E%CF%89%3C%2Fmi%3E%3Cmi%3EA%3C%2Fmi%3E%3C%2Fmsub%3E%3Cmo%3E%3A%3C%2Fmo%3E%3Cmsub%3E%3Cmi%3E%CF%89%3C%2Fmi%3E%3Cmi%3EB%3C%2Fmi%3E%3C%2Fmsub%3E%3Cmo%3E%3A%3C%2Fmo%3E%3Cmsub%3E%3Cmi%3E%CF%89%3C%2Fmi%3E%3Cmi%3EC%3C%2Fmi%3E%3C%2Fmsub%3E%3Cmo%3E%3D%3C%2Fmo%3E%3Cmn%3E1%3C%2Fmn%3E%3Cmo%3E%3A%3C%2Fmo%3E%3Cmn%3E2%3C%2Fmn%3E%3Cmo%3E%3A%3C%2Fmo%3E%3Cmn%3E2%3C%2Fmn%3E%3C%2Fmrow%3E%3C%2Fmath%3E" style="max-width:100%;vertical-align: middle;"></span></span> <span id="hdaur54" class="op-item"><span id="egjskm5" class="op-item-nut">C . </span><span id="olbecea" class="op-item-meat">轉(zhuǎn)速之比<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%3Cmsub%3E%3Cmi%3En%3C%2Fmi%3E%3Cmi%3EA%3C%2Fmi%3E%3C%2Fmsub%3E%3Cmo%3E%3A%3C%2Fmo%3E%3Cmsub%3E%3Cmi%3En%3C%2Fmi%3E%3Cmi%3EB%3C%2Fmi%3E%3C%2Fmsub%3E%3Cmo%3E%3A%3C%2Fmo%3E%3Cmsub%3E%3Cmi%3En%3C%2Fmi%3E%3Cmi%3EC%3C%2Fmi%3E%3C%2Fmsub%3E%3Cmo%3E%3D%3C%2Fmo%3E%3Cmn%3E2%3C%2Fmn%3E%3Cmo%3E%3A%3C%2Fmo%3E%3Cmn%3E2%3C%2Fmn%3E%3Cmo%3E%3A%3C%2Fmo%3E%3Cmn%3E1%3C%2Fmn%3E%3C%2Fmrow%3E%3C%2Fmath%3E" style="max-width:100%;vertical-align: middle;"></span></span> <span id="s5594su" class="op-item"><span id="z4joa4l" class="op-item-nut">D . </span><span id="k56kdek" class="op-item-meat">向心加速度大小之比<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%3Cmsub%3E%3Cmi%3Ea%3C%2Fmi%3E%3Cmi%3EA%3C%2Fmi%3E%3C%2Fmsub%3E%3Cmo%3E%3A%3C%2Fmo%3E%3Cmsub%3E%3Cmi%3Ea%3C%2Fmi%3E%3Cmi%3EB%3C%2Fmi%3E%3C%2Fmsub%3E%3Cmo%3E%3A%3C%2Fmo%3E%3Cmsub%3E%3Cmi%3Ea%3C%2Fmi%3E%3Cmi%3EC%3C%2Fmi%3E%3C%2Fmsub%3E%3Cmo%3E%3D%3C%2Fmo%3E%3Cmn%3E1%3C%2Fmn%3E%3Cmo%3E%3A%3C%2Fmo%3E%3Cmn%3E2%3C%2Fmn%3E%3Cmo%3E%3A%3C%2Fmo%3E%3Cmn%3E2%3C%2Fmn%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="kso5nzc" id="J_ConnectQuestionsdBox"> </div> </div> </div> <div id="rqvrogw" class="g-sd2">  <div style="background:#fff;padding:20px 0;margin-bottom:20px;text-align:center;"> <img src="/question/paper-qrcode?id=57909335" width="140px" height="140px" alt=""> <p style="text-align:center;margin-top: 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