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</ul> </div> </div> </div> <div id="3pvxbdl" class="crumbs g-cw"> <i class="iconw-fixed"></i> <span>當前位置：</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="nfvdd77" class="m-wrap g-cw cfx"> <div id="dvl3dbl" class="w fl"> <div id="lhprjd3" class="g-mn2"> <ul id="J_question_detail" > <li> <div id="vzvjj3l" class="question-block"> <div id="bfbfrzf" class="q-mc"> <h1 class="q-tit"> 1. <a href="/paper/view-5180669.shtml" class="ques-origin a-pointer" target="_blank"> (2023七下·江津期末) </a> 下列命題正確的是（　?。? </h1> <div id="tb3djdp" class="exam-s"> <span id="llv3rtj" class="op-item"><span id="r3nd7x3" class="op-item-nut">A . </span><span id="1l5lrpj" class="op-item-meat">所有實數(shù)不是正數(shù)就是負數(shù)</span></span> <span id="zdjnvjd" class="op-item"><span id="bxhvlrl" class="op-item-nut">B . </span><span id="h5ffhdv" class="op-item-meat">相等的角是對頂角</span></span> <span id="xh5bvl3" class="op-item"><span id="lfrzzxb" class="op-item-nut">C . </span><span id="xzxvb5t" class="op-item-meat">如果<img class="mathml" src="http://math.21cnjy.com/MathMLToImage?mml=%3Cmath+xmlns%3D%22http%3A%2F%2Fwww.w3.org%2F1998%2FMath%2FMathML%22%3E%3Cmsup%3E%3Cmrow%3E%3Cmi%3Ex%3C%2Fmi%3E%3C%2Fmrow%3E%3Cmrow%3E%3Cmn%3E2%3C%2Fmn%3E%3C%2Fmrow%3E%3C%2Fmsup%3E%3Cmo%3E%3D%3C%2Fmo%3E%3Cmsup%3E%3Cmrow%3E%3Cmi%3Ey%3C%2Fmi%3E%3C%2Fmrow%3E%3Cmrow%3E%3Cmn%3E2%3C%2Fmn%3E%3C%2Fmrow%3E%3C%2Fmsup%3E%3C%2Fmath%3E" style="max-width:100%;vertical-align: middle;"> ，那么<img class="mathml" src="http://math.21cnjy.com/MathMLToImage?mml=%3Cmath+xmlns%3D%22http%3A%2F%2Fwww.w3.org%2F1998%2FMath%2FMathML%22%3E%3Cmi%3Ex%3C%2Fmi%3E%3Cmo%3E%3D%3C%2Fmo%3E%3Cmi%3Ey%3C%2Fmi%3E%3C%2Fmath%3E" style="max-width:100%;vertical-align: middle;"></span></span> <span id="1jnpnjn" class="op-item"><span id="53rnnjl" class="op-item-nut">D . </span><span id="txvbf1v" class="op-item-meat">同一平面內(nèi)，如果<img class="mathml" src="http://math.21cnjy.com/MathMLToImage?mml=%3Cmath+xmlns%3D%22http%3A%2F%2Fwww.w3.org%2F1998%2FMath%2FMathML%22%3E%3Cmi%3Ea%3C%2Fmi%3E%3Cmtext%3E%E2%88%A5%3C%2Fmtext%3E%3Cmi%3Ec%3C%2Fmi%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%3Cmi%3Eb%3C%2Fmi%3E%3Cmtext%3E%E2%88%A5%3C%2Fmtext%3E%3Cmi%3Ec%3C%2Fmi%3E%3C%2Fmath%3E" style="max-width:100%;vertical-align: middle;"> ，那么<img class="mathml" src="http://math.21cnjy.com/MathMLToImage?mml=%3Cmath+xmlns%3D%22http%3A%2F%2Fwww.w3.org%2F1998%2FMath%2FMathML%22%3E%3Cmi%3Ea%3C%2Fmi%3E%3Cmtext%3E%E2%88%A5%3C%2Fmtext%3E%3Cmi%3Eb%3C%2Fmi%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="1fjxfdt" id="J_ConnectQuestionsdBox"> </div> </div> </div> <div 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