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style="max-width:100%;"></p> </h1> <div id="n7hdptj" class="exam-s"> <span id="26idjst" class="op-item"><span id="qh2b7gp" class="op-item-nut">A . </span><span id="a2lwibm" class="op-item-meat">b球先于a球到達軌道的最低點</span></span> <span id="hmtzq7h" class="op-item"><span id="rhuwzih" class="op-item-nut">B . </span><span id="hbul7cn" class="op-item-meat">a?b兩球第一次經(jīng)過軌道最低點時，b球?qū)壍赖膲毫Ω?/span></span> <span id="cm62f2g" class="op-item"><span id="lg2sd27" class="op-item-nut">C . </span><span id="awj2oys" class="op-item-meat">三小球向下運動過程中，c球到達軌道最低點的速度最小</span></span> <span id="lcuqhfk" class="op-item"><span id="yjlxdxm" class="op-item-nut">D . </span><span id="ijcy7av" class="op-item-meat">c球運動過程中，其重力勢能最小時，電勢能一定最大</span></span> </div> </div> </div> </li> </ul> <div style="height:20px;background-color: #fff;margin-top:1px"></div>  <div class="7s6gid6" id="J_ConnectQuestionsdBox"> </div> </div> </div> <div id="7ao72w1" class="g-sd2">  <div style="background:#fff;padding:20px 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