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1、2015-11-09Inthelecture,theprofessorcastsdoubtontheviewinthereadingpassagethatseveralmeasureshavebeenproposedtostopthespreadofthecanetoadinAustralia,claimingthatwaysareunsuccessfulandwillcauseunwantedenvironmentaldamage.Firstly,itisarguedbytheauthorthatbuildingan
2、ationalfencecanbeaway.Onthecontrary,theprofessorrefutesthisbysayingthatyoungtoadsoreggscanflowfromonesidetoanothersidethroughwaterwayslikestreamsandthenestablishnewpopulationwhereverthefenceareset.Secondly,accordingtothepassage,thetoadscouldbecapturedanddestroye
3、dbyvolunteers.However,theprofessorinthelisteningstronglychallengesthisbysayingthattheuntrainedvolunteerswillputnativefrogsindanger,whichexertannegativeeffect.Itisnoteasytotellapartfromfrogsandcanetoadsfromanearlyage.Lastly,withrespecttothereadingpassagethatcanet
4、oadpopulationscanbecontrolledbydevelopingadisease-causingvirus.Ontheotherhand,theprofessormentionsthatitwillleadtoterribleconsequences.Theviruscontactwiththecanetoadswilldevastatetheirpopulation,eveninothercontinentsthatvirusgetbytransverseofotherspecies,whichca
5、useaecologicaldamagebecausetheyareanimportantpartfromthenativeAmerica.2015-11-10Inthereadingpassage,theauthorstatesthatthescienceofarchaeologywasfacedwithseriousproblemsandlimitationsinBritain.However,theprofessorindicatesthatthegovernmenthaspublishednewguidelin
6、etoimprovethesituation.Firstly,itisarguedbytheauthorthatowingtoconstructionprojects,manyvaluableartifactswerelost.Onthecontrary,theprofessorsaysthatbeforeanyconstruction,thecitesshouldbeexaminedbyarchaeologiststoseeiftheyarevaluableinterests.Iftheyare,archaeolog
7、istswillmakeaplantopreservethemproperly.Secondly,accordingtothereadingpassage,thefinancialsupportforarchaeologyresearchwasinadequate.Theprofessorinthelisteningstronglychallengethisbysayingthatthepayment,includingthecostforexamines,preservationandeventherebuildon
8、thegreatside,willbepaidbytheconstructioncompaniesinsteadofthegovernment.Thus,thearchaeologistsareabletostudyagreaterrangeofsidesthanthepast.Lastly,withrespecttotherea
