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大学英语四级仔细阅读测试题大学英语四级仔细阅读测试题 英语四级考试的主要对象是根据教育大纲修完大学英语四级的在校大学本科生或研究生下面梳理了大学英语四级仔细阅读测试题,供大家参考借鉴 Just sevenyears ago,the Jarvik-7artificial heartwas beingcheered asthe modelof humancreativeness.The sightof BarneyClark-alive andconscious aftertrading hisdiseased heartfor ametal-and-plastic pump-convinced thepress,the publicand manydoctors thatthe futurehad arrived.It hadn’t.After monitoringproduction ofthe Jarvik-7,and reviewingits effectson the150or sopatients mostof whomgot the device asa temporarymeasure theU.S.Food andDrug Administrationconcluded thatthe machinewas doingmore toendanger livesthan tosave them.Last weekthe agencycancelled itsearlier approval,effectively banning禁止thedevice. The recallmay hurtSymbion Inc.,maker ofthe Jarvik-7,but itwon’t endthe requestfor anartificial heart.One problemwith thebanned modeis thatthe tubesconnecting itto anexternal powersource createdapassage forinfection....。