unit19-reading课件
日期：2010-02-22 02:12
manydieorarekilledTheeggsandmeataretastyTheydon’ttastesodeliciousThechickensarefreenotfree，Unit19ModernAgricultureTask1Pre-readingLookatthepicturesatp45andcomparetraditionalandmodernfarming1Whatcanyouseeinthepictures?2Whataretheadvantagesanddisadvan-tagesofeachway?Inthefirstpicture:Achicken/AhenInthesecondpicture:AfarmerfeedingchickensInthethirdpicture:AmodernchickenfarmWhatarethedifferences?ComparetheoldandthemodernwaysofraisingchickensAfarmercanonlykeepafewchickensAfactorycankeepthou-sandsofchickensItcostonlyalittlemoneyItcostalottostartafactorydon’thavemanyproblemsifill，sitinsmallcagesInthefirstpicture:Apileofanimalshit(manure)Inthesecondpicture:AbagofchemicalfertilizerWhatarethedifferences?ComparetheoldandthemodernwaysoffeedingthecropsItisfreeorcostverylittleItiseasytobeputintothefieldsItusuallyhasabadsmellIttakeslittleplacetostoreItisdifficulttocarryandmoveItisexpensivetobuyItneedslotsofworktomixitwith，
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