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</li> </ul> </div> </div>   <div id="gwr18lkl3dc" class="crumbs-wrap layout">當前位置：<a href='/' target='_self'>建設工程教育網(wǎng)</a> > <a href='/jianzao2/'>二級建造師考試</a> > <a href='/jianzao2/fxzl/'>備考資料</a> > <a href='/jianzao2/ziliao/'>復習資料</a></div>  <div id="gwr18lkl3dc" class="layout clearfix">  <div id="gwr18lkl3dc" class="main-left clearfix">  <a href="http://m.zcjx68.com/zhuanti/2025kaixueji/" target="_blank" title="開(kāi)學(xué)季活動(dòng)"><img src="/upload/resources/image/2025/08/28/603361.png" alt="開(kāi)學(xué)季活動(dòng)" class="banner"></a>   <div id="gwr18lkl3dc" class="news_mian"> <h1><span id="ycTitle"></span>關(guān)于選用保冷材料的說(shuō)法，正確的是（?。?/h1> <div id="gwr18lkl3dc" class="mark"> <div id="gwr18lkl3dc" class="lTxt"> <span id="gwr18lkl3dc" class="time">2019-02-27 16:47</span> <span id="gwr18lkl3dc" class="source">來(lái)源：<a href="http://m.zcjx68.com" title="建設工程教育網(wǎng)">建設工程教育網(wǎng)</a></span> </div> <a href="javascript:void(0);" target="_self" class="collection li-an"></a> <a 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<p>　　『答案解析』本題考查的是絕熱材料的主要技術(shù)性能。選項A，正確的說(shuō)法應為材料的導熱系數乘以材料的單位價(jià)格，其值越小越經(jīng)濟;選項C，正確的說(shuō)法應為對纖維狀材料，當密度小到一定值時(shí)，在材料的氣孔中輻射、對流兩種傳熱方式的影響加強了，反而使導熱系數增加。選項D，正確的說(shuō)法應為在保冷層材料的選擇中，應先選用經(jīng)濟的保冷材料或制品，材料或制品宜為閉孔型，吸水及吸濕率低，耐低溫性能好，并具有阻燃性，氧指數應不小于30%。故保冷材料的吸濕率不是越高越好，應選用吸濕率低的。此題涉及知識點(diǎn)在新版教材中已刪除。</p> <p>　　建設工程教育網(wǎng)2019年二級建造師高效套餐，網(wǎng)?？偨Y多年成功輔導經(jīng)驗，從學(xué)員實(shí)際需求出發(fā)，結合二級建造師考試命題規律、重點(diǎn)、難點(diǎn)，融入先進(jìn)的教學(xué)理念。高效備戰2019年二級建造師考試，打造零基礎全科直達方案，全新課程套餐，快速進(jìn)步，取證必修課！<a target="_blank" href="http://m.zcjx68.com/project/jianzao2/">查看直達套餐>></a></p> <p>　　<strong>相關(guān)推薦：</strong></p> <p>　　<a target="_blank" href="http://m.zcjx68.com/jianzao2/zhuanti/2019ejbmsj/index.shtml">2019年二級建造師報名時(shí)間查詢(xún)入口</a></p> <p>　　<a target="_blank" href="http://m.zcjx68.com/jianzao2/baomingchaxun/index.shtml">2019年二級建造師報名條件查詢(xún)平臺</a></p> <p>　　<a target="_blank" href="http://m.zcjx68.com/jianzao2/zhuanti/2019ejbwbd/">2019年二級建造師報考百問(wèn)百答</a></p><div id="gwr18lkl3dc" 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