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第二节3640DBEAF
C【语篇导读】这是一篇新闻报道。加拿大人米兰达·王和她的公司BioCellection利用催化剂提高了塑料的回收利用率。28.A【解析】作出判断推理。根据第二段的"Stability is one of plastic greatest qualities anddownside'”可推知，塑料在化学上是稳定的，所以很少有塑料被回收。故选A项。29.C【解析】理解具体信息。根据第三段的“‘That'sa very limited process'she says,due to therequirement that plastics be‘clean’.”和第三段的“but‘it's not economical,’”可知，王认为目前的两种方法有限且耗能。故选C项。30.D【解析】理解具体信息。根据第四段的“In theyears since,they engineered a comparable catalystcapable of doing the same job,only faster,whicheven works on plastics no one else can recycle atpresent.'We have now found a catalyst that ismuch cheaper than the one that was used before,'Wang says.”可知，BioCellection找到一种有效回收塑料的催化剂，故选D项。31.B【解析】理解主旨要义。通读全文，尤其是第四段的“In the years since,tthey engineeredacomparable catalyst capable of doing the same job,only faster,which even works on plastics no oneelse can recycle at present'”可知，本文主要讲的是一种新的塑料回收方法。故选B项。
