Unit 3 Science versus nature 课件 11.ppt

Welcome everyone Unit3Scienceversusnature课件11 Skillsbuilding1 changingorcorrectingatext Youandyourfriendjustfinishedaprojectaboutheight increasingoperations Andyouhavetakennotesbutyou reafraidyoumayhavemadesomemistakeninformation Rememberto 1 payattentiontowordsorphrasesthatexpresscontradiction suchas No Idon tthinkso That snotright Areyousure AndIthinkitshouldbe LookatPage52andlistentothedialoguetocheckthenotes Attention centimetre cm millimetre mm breakthebonesofyourlegslookoverthenotes Listentothetapeandcorrectthefollowingsentences 1 Legscanbelengthenedbyupto8cm 2 Legsaremadetogrow1mmperweek 3 Thenewboneisnotasstrongastheoriginalbone 18cm everyday PassageOne 4 A45 year oldmandiedaftertryingtogrowby6cm 5 Patientscan tdoanyexerciseforthreeyears 6 Ittakes14monthstoincreaseyourheightby12cm 7 Ageofpatients 16to55 8 5 ofoperationsareunsuccessful 9 CostsRMB185 000 A35 year old two 18 60 8 8500 Step1confirminginformation hightechnology hi tech atalkonGMfood WhatisGMfood Zx xk GeneticallyModified GM food Passagetwo 含乙肝疫苗的转基因土豆 LookatPage53andlistentothedialoguetocheckthenotes Attention growthhormones becausetheamount whichis producedisusuallylarger Tastetestsrevealthatittastes free rangefoodSotheytendtosellthem They renotkeptindarksheds Listenandcorrectthefollowingnotes1 Growthhormonesareusedinmeat eggsandvegetables 2 Growthhormonesmakeanimalsgrowfatter 3 Growthhormoneskeepanimalshealthy faster don thelpkeepanimalshealthy 4 GMfoodismoreexpensivethannaturalfood 5 GMfoodtechnologyisanewscientificdevelopment 6 GMfoodtastesbetterthannaturalfood 7 Free rangefoodcomesfromanimalsthataregivendrugs cheaper isn t thesameas aren t 8 Free rangefoodischeaperthanGMfood 9 Free rangeanimalsarekeptindarksheds 10 Mostpeoplewouldn tpaymoreforfree rangefood moreexpensive aren t don tmindpaying Tapescript S StudentS ScientistS ThankyoufortakingthetimetocomeandtalktousaboutGMfood S It smypleasure S I mgladIhavetheopportunitytotalktoyoubeforethelecture I dliketoasksomequestions S Ok whatwouldyouliketoknow S Well whyaregrowthhormonesusedinmeat eggsandvegetables S Actually they reonlyusedinmeat S Oh Idon tknowthat Whydofarmersusegrowthhormones S Theyusetheminordertomakeanimalsgrowfaster S Iguesshormonescanalsokeepanimalhealthy S No that snottrue Thehormonesdon thelpkeepthemhealthy Theycanstillbecomeill S Oh Ididn tknowthat SowhataretheadvantagesofGMfoodthen S Well it scheaperthannaturalfoodbecausetheamountproducedisusuallylarger S Isee Butisn titdangerous S Notatall FarmershavebeenusingGMfoodtechnologyforyears There snothingnewaboutit S Really I venevertriedGMfood ButI veheardthatitdoesn ttastethesameasnaturalfood S Idon tthinkthat strue Tastetestsrevealthatittastesexactlythesameasnaturalfood S Well that goodtoknow Whataboutfree rangefood Whatdoesthatmean S Free rangefoodcomesfromanimalsthatarenotgivendrugs S Thatmeansit scheaperthanGMfood right S No it sactuallymoreexpensive Free rangeanimalsgrowlessquickly Farmershavefewanimalstosee sotheytendtosellthematahigherprice S But don tfree rangeanimalshaveabetterlife S Yes that strue Free rangeanimalsliveoutsideinfields Theyarenotkeptindarksheds That swhywecallitfree rangefood becausetheanimalsarefree S Well inthatcaseIwouldratherpayalittlebitmoremoneytobuyfree rangefood S Manypeoplefeeltha