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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="r5hfdd3" class="m-wrap g-cw cfx"> <div id="jzt91xt" class="w fl"> <div id="rb3t5ft" class="g-mn2"> <ul id="J_question_detail" > <li> <div id="fzfxv5p" class="question-block"> <div id="tbr715p" class="q-mc"> <h1 class="q-tit"> 1. 下列運(yùn)算中沒有意義的是（　?。?/p><p><br></p> </h1> <div id="5fpj3nz" class="exam-s"> <span id="dhxtrnv" class="op-item"><span id="zf9hthf" class="op-item-nut">A . </span><span id="vn3bx7v" class="op-item-meat">﹣2006÷[（﹣<img class="mathml" src="http://math.21cnjy.com/MathMLToImage?mml=%3Cmath+xmlns%3D%22http%3A%2F%2Fwww.w3.org%2F1998%2FMath%2FMathML%22%3E%3Cmfrac%3E%3Cmn%3E7%3C%2Fmn%3E%3Cmn%3E3%3C%2Fmn%3E%3C%2Fmfrac%3E%3C%2Fmath%3E" style="max-width:100%;vertical-align: middle;">）×3+7] </span></span> <span id="ldzprll" class="op-item"><span id="19jh7lf" class="op-item-nut">B . </span><span id="pbpv3dj" class="op-item-meat">[（﹣<img class="mathml" src="http://math.21cnjy.com/MathMLToImage?mml=%3Cmath+xmlns%3D%22http%3A%2F%2Fwww.w3.org%2F1998%2FMath%2FMathML%22%3E%3Cmfrac%3E%3Cmn%3E7%3C%2Fmn%3E%3Cmn%3E3%3C%2Fmn%3E%3C%2Fmfrac%3E%3C%2Fmath%3E" style="max-width:100%;vertical-align: middle;">）×3+7]÷（﹣2006）</span></span> <span id="375brxj" class="op-item"><span id="1dvp55x" class="op-item-nut">C . </span><span id="7fxrhtv" class="op-item-meat">（<img class="mathml" src="http://math.21cnjy.com/MathMLToImage?mml=%3Cmath+xmlns%3D%22http%3A%2F%2Fwww.w3.org%2F1998%2FMath%2FMathML%22%3E%3Cmfrac%3E%3Cmn%3E1%3C%2Fmn%3E%3Cmn%3E3%3C%2Fmn%3E%3C%2Fmfrac%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%3Cmfrac%3E%3Cmn%3E1%3C%2Fmn%3E%3Cmn%3E2%3C%2Fmn%3E%3C%2Fmfrac%3E%3C%2Fmath%3E" style="max-width:100%;vertical-align: middle;">）÷[0﹣（﹣4）]×（﹣2）</span></span> <span id="dnbf7bb" class="op-item"><span id="ph5rxlv" class="op-item-nut">D . </span><span id="h1zfpjh" class="op-item-meat">2<img class="mathml" src="http://math.21cnjy.com/MathMLToImage?mml=%3Cmath+xmlns%3D%22http%3A%2F%2Fwww.w3.org%2F1998%2FMath%2FMathML%22%3E%3Cmfrac%3E%3Cmn%3E1%3C%2Fmn%3E%3Cmn%3E3%3C%2Fmn%3E%3C%2Fmfrac%3E%3C%2Fmath%3E" style="max-width:100%;vertical-align: middle;">÷（3<img class="mathml" src="http://math.21cnjy.com/MathMLToImage?mml=%3Cmath+xmlns%3D%22http%3A%2F%2Fwww.w3.org%2F1998%2FMath%2FMathML%22%3E%3Cmfrac%3E%3Cmn%3E1%3C%2Fmn%3E%3Cmn%3E3%3C%2Fmn%3E%3C%2Fmfrac%3E%3C%2Fmath%3E" style="max-width:100%;vertical-align: middle;">×6﹣18）</span></span> </div> </div> </div> </li> </ul> <div style="height:20px;background-color: #fff;margin-top:1px"></div>  <div class="zfnhrhr" id="J_ConnectQuestionsdBox"> </div> </div> </div> <div id="5d5h37r" class="g-sd2">  <div style="background:#fff;padding:20px 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