Exposuretoenvironmentaltobaccosmoke(ETS)-alsocalled“second-handsmoke”and“passivesmoking”containsover2023chemicalsincludingover50knowncarcinogens(致癌物)andmanypoisonousthings.NosafelevelofETSexposu
<p>问题：Exposuretoenvironmentaltobaccosmoke(ETS)-alsocalled“second-handsmoke”and“passivesmoking”containsover2023chemicalsincludingover50knowncarcinogens(致癌物)andmanypoisonousthings.NosafelevelofETSexposu<p>答案：↓↓↓<p class="nav-title mt10" style="border-top:1px solid #ccc;padding-top: 10px;">丁玉波的回答：<div class="content-b">网友采纳 小题1:D小题2:A小题3:B小题4:B小题5:C
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