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</li>  <li id="av6pbuk" class="login-item"> <a class="top-login-item">登錄</a> <a class="top-register-item">注冊</a> </li> </ul> </div> </div> </div> <div id="fyd19mf" class="crumbs g-cw"> <i class="iconw-fixed"></i> <span>當(dāng)前位置：</span>   <a href="/question?tree_type=category&xd=2&chid=3" class="pointer">初中數(shù)學(xué)</a> <span>/</span> <a href="javascript:;">單選題</a> </div> <div id="x9jdu31" class="m-wrap g-cw cfx"> <div id="rjdubcf" class="w fl"> <div id="ytixhhl" class="g-mn2"> <ul id="J_question_detail" > <li> <div id="2hba7hv" class="question-block"> <div id="4o8sez0" class="q-mc"> <h1 class="q-tit"> 1. <a href="/paper/view-1644419.shtml" class="ques-origin a-pointer" target="_blank"> (2019八上·江川期末) </a> 已知關(guān)于x、y的方程組 <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%3Cmtext%3E%7B%3C%2Fmtext%3E%3Cmtable%3E%3Cmtr%3E%3Cmtd%3E%3Cmrow%3E%3Cmi%3Em%3C%2Fmi%3E%3Cmi%3Ex%3C%2Fmi%3E%3Cmo%3E%2B%3C%2Fmo%3E%3Cmi%3Ey%3C%2Fmi%3E%3Cmo%3E%3D%3C%2Fmo%3E%3Cmn%3E0%3C%2Fmn%3E%3C%2Fmrow%3E%3C%2Fmtd%3E%3C%2Fmtr%3E%3Cmtr%3E%3Cmtd%3E%3Cmrow%3E%3Cmi%3Ex%3C%2Fmi%3E%3Cmo%3E%2B%3C%2Fmo%3E%3Cmi%3En%3C%2Fmi%3E%3Cmi%3Ey%3C%2Fmi%3E%3Cmo%3E%3D%3C%2Fmo%3E%3Cmn%3E3%3C%2Fmn%3E%3C%2Fmrow%3E%3C%2Fmtd%3E%3C%2Fmtr%3E%3C%2Fmtable%3E%3Cmtext%3E%26nbsp%3B%3C%2Fmtext%3E%3C%2Fmrow%3E%3C%2Fmath%3E" style="max-width:100%;vertical-align: middle;"> ，解是 <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%3Cmtext%3E%7B%3C%2Fmtext%3E%3Cmtable%3E%3Cmtr%3E%3Cmtd%3E%3Cmrow%3E%3Cmi%3Ex%3C%2Fmi%3E%3Cmo%3E%3D%3C%2Fmo%3E%3Cmo%3E%E2%88%92%3C%2Fmo%3E%3Cmn%3E1%3C%2Fmn%3E%3C%2Fmrow%3E%3C%2Fmtd%3E%3C%2Fmtr%3E%3Cmtr%3E%3Cmtd%3E%3Cmrow%3E%3Cmi%3Ey%3C%2Fmi%3E%3Cmo%3E%3D%3C%2Fmo%3E%3Cmo%3E%E2%88%92%3C%2Fmo%3E%3Cmn%3E2%3C%2Fmn%3E%3C%2Fmrow%3E%3C%2Fmtd%3E%3C%2Fmtr%3E%3C%2Fmtable%3E%3Cmtext%3E%26nbsp%3B%3C%2Fmtext%3E%3C%2Fmrow%3E%3C%2Fmath%3E" style="max-width:100%;vertical-align: middle;"> ，則2m+n的值為（　?。? </h1> <div id="xgkmhua" class="exam-s"> <span id="hqzw3ng" class="op-item"><span id="flodk8l" class="op-item-nut">A . </span><span id="gd9vz0p" class="op-item-meat">﹣6</span></span> <span id="cjahjgt" class="op-item"><span id="ow49tpm" class="op-item-nut">B . </span><span id="hzcsjcl" class="op-item-meat">2</span></span> <span id="yluhadv" class="op-item"><span id="kfqq5lr" class="op-item-nut">C . </span><span id="hsxmxru" class="op-item-meat">1</span></span> <span id="rzor8dq" class="op-item"><span id="zd27opx" class="op-item-nut">D . </span><span id="tqssycn" class="op-item-meat">0</span></span> </div> </div> </div> </li> </ul> <div style="height:20px;background-color: #fff;margin-top:1px"></div>  <div class="zv70ldl" id="J_ConnectQuestionsdBox"> </div> </div> </div> <div id="xdjzdqb" class="g-sd2">  <div style="background:#fff;padding:20px 0;margin-bottom:20px;text-align:center;"> <img src="/question/paper-qrcode?id=10796203" 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="iepg8e0" 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-5400464.shtml" target="_blank" title="【提升版】北師大版數(shù)學(xué) 八年級上冊5.1認(rèn)識二元一次方程組同步練習(xí)" class="ex-tit"> <b></b><span>【提升版】北師大版數(shù)學(xué) 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