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id="x6gp2hc" 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="pa5b1pl" 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="peabya9" class="m-wrap g-cw cfx"> <div id="5loglys" class="w fl"> <div id="a73nkcm" class="g-mn2"> <ul id="J_question_detail" > <li> <div id="9lewu5q" class="question-block"> <div id="adxio8j" class="q-mc"> <h1 class="q-tit"> 1. 已知拋物線y=x<sup>2</sup>+bx+c的頂點坐標(biāo)為（1，﹣3），則拋物線對應(yīng)的函數(shù)解析式為（　?。?/p> </h1> <div id="onyqg5p" class="exam-s"> <span id="zhclb7p" class="op-item"><span id="uavde8o" class="op-item-nut">A . </span><span id="kq8taxw" class="op-item-meat">y=x<sup>2</sup>﹣2x+2</span></span> <span id="mgslx0i" class="op-item"><span id="ayh4d6y" class="op-item-nut">B . </span><span id="sk210hk" class="op-item-meat">y=x<sup>2</sup>﹣2x﹣2</span></span> <span id="kzwp8i3" class="op-item"><span id="7ykmvmt" class="op-item-nut">C . </span><span id="8t9ndkc" class="op-item-meat">y=﹣x<sup>2</sup>﹣2x+1</span></span> <span id="ch6xhw4" class="op-item"><span id="omohf34" class="op-item-nut">D . </span><span id="t3ulbke" class="op-item-meat">y=x<sup>2</sup>﹣2x+1</span></span> </div> </div> </div> </li> </ul> <div style="height:20px;background-color: #fff;margin-top:1px"></div>  <div class="elwwodd" id="J_ConnectQuestionsdBox"> </div> </div> </div> <div id="uqtekas" class="g-sd2">  <div style="background:#fff;padding:20px 0;margin-bottom:20px;text-align:center;"> <img src="/question/paper-qrcode?id=2154738" 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="9ztdyuv" 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-2379433.shtml" 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