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<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%3Cmi%3E%CF%81%3C%2Fmi%3E%3Cmo%3E%3D%3C%2Fmo%3E%3Cmtext%3E2%3C%2Fmtext%3E%3Cmo%3E.%3C%2Fmo%3E%3Cmtext%3E7%3C%2Fmtext%3E%3Cmo%3E%C3%97%3C%2Fmo%3E%3Cmtext%3E1%3C%2Fmtext%3E%3Cmsup%3E%3Cmn%3E0%3C%2Fmn%3E%3Cmrow%3E%3Cmtext%3E-%3C%2Fmtext%3E%3Cmn%3E8%3C%2Fmn%3E%3C%2Fmrow%3E%3C%2Fmsup%3E%3Cmi%3E%CE%A9%3C%2Fmi%3E%3Cmo%3E%2F%3C%2Fmo%3E%3Cmtext%3Em%3C%2Fmtext%3E%3C%2Fmrow%3E%3C%2Fmath%3E" style="max-width:100%;vertical-align: middle;"> ，導(dǎo)線的橫截面積為 <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%3Cmi%3ES%3C%2Fmi%3E%3Cmo%3E%3D%3C%2Fmo%3E%3Cmtext%3E1%3C%2Fmtext%3E%3Cmo%3E.%3C%2Fmo%3E%3Cmtext%3E8%3C%2Fmtext%3E%3Cmo%3E%C3%97%3C%2Fmo%3E%3Cmtext%3E1%3C%2Fmtext%3E%3Cmsup%3E%3Cmn%3E0%3C%2Fmn%3E%3Cmrow%3E%3Cmo%3E%E2%88%92%3C%2Fmo%3E%3Cmtext%3E4%3C%2Fmtext%3E%3C%2Fmrow%3E%3C%2Fmsup%3E%3Cmsup%3E%3Cmtext%3Em%3C%2Fmtext%3E%3Cmtext%3E2%3C%2Fmtext%3E%3C%2Fmsup%3E%3C%2Fmrow%3E%3C%2Fmath%3E" style="max-width:100%;vertical-align: middle;"> ，導(dǎo)線上通過的電流約為100A。估算鳥兩爪間的電壓（V）數(shù)量級(jí)為（　?。? </h1> <div id="uaggqqq" class="exam-s"> <span id="22m2esk" class="op-item"><span id="uek2cwa" class="op-item-nut">A . </span><span id="wqogwms" class="op-item-meat">10<sup>-2</sup></span></span> <span id="eiacaai" class="op-item"><span id="aayqss2" class="op-item-nut">B . </span><span id="2qykyy2" class="op-item-meat">10<sup>-4</sup></span></span> <span id="o2g2msk" class="op-item"><span id="mwskccw" class="op-item-nut">C . </span><span id="qe2ccss" class="op-item-meat">10<sup>-6</sup></span></span> <span id="imi2ock" class="op-item"><span id="scg2cgw" class="op-item-nut">D . </span><span id="2yw22aq" class="op-item-meat">10<sup>-8</sup></span></span> </div> </div> </div> </li> </ul> <div style="height:20px;background-color: #fff;margin-top:1px"></div>  <div class="ie242oa" id="J_ConnectQuestionsdBox"> </div> </div> </div> <div id="aogokkg" class="g-sd2">  <div style="background:#fff;padding:20px 0;margin-bottom:20px;text-align:center;"> <img src="/question/paper-qrcode?id=50720397" 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="iuia22i" class="analyize-extend JV_question__papers"> <h3 class="extend-mt">使用過本題的試卷</h3> <ul class="extend-mc"> <li> <a href="/paper/view-5032897.shtml" target="_blank" title="河南省豫南九校2020-2021學(xué)年高二上學(xué)期物理第四次聯(lián)考試卷" class="ex-tit"> 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