托福TPO15作文 独立写作模板.doc

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1、Inordertocontrolthenumberofcanetoads,readingpassagestatesthatthreemethodstocontrolcanetoads,whilethelecturearguethesemethodsandpointouttheyareuseless.Firstly,thepassageholdanopinionthatbuildanaturefencewhichcouldseparateintopartsandavoidcanetoadsinvadeintootherareas.Howeve

2、rthelectureholdsadifferentopinionandconsiderthatbuildinganaturefenceisuseless.Itpointsthatcanetoadslaytheireggsinriversandriversarealwaysflowing.Sothestatementinthereadingisnotconvincing.Secondly,itisclaimedinthereadingthattrappingsanddestroycanetoadsbyvolunteersandlocalpe

3、oplebecausecanetoadsrelyonwaterandeasycaptured.Incontact,thelecturesuggestsotherwise,itsaysthateventhoughcanetoadscanbetrappedbyvolunteer,theseuntrainedvolunteersalsocoulddestroymanyofAustralia’sfrogs,someofwhichareendangered.Frogsandcanetoadsaresimilarespeciallywhentheyar

4、eyoung.Sothismethodwouldalsodestroyfrogs.Finally,thereadingcontendsthatcreateaspecialvirusthatallowcanetoadstogetdiseaseandotherspeciesnot.Butthelecturearguesthatthisviruscouldcauseotherareas’canetoadsgetdiseaseeither.Theprofessorisabletocarrycanetoadstoanothercountrysuchl

5、ikeSouthAmericawherecanetoadsareanimportantspecieinlocalecologicalcircumstance.Sothismethodisnoteffective.