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1、雅思阅读、强化标准教程搭配题:P21-23Youareadvisedtospendabout15minutesonQuestions1-12whicharebasedonReadingpassage1.OfDucksandDuckEggsForpeoplewholiketokeeppoultry,duckoffercertainadvantagesoverhens.Ducksareimmunetosomecommondiseasesfoundinhensandarelessvulnerabletoothers.Somebreed
2、sofduckproducebiggereggsthanhens.Inaddition,duckslayeggsoveralongerseasonthandohens.Poultrykeeperswithgardenshavelesstoworryaboutiftheykeepducksratherthanhensbecausetheformerarelessapttodigupplantsanddestroyroots.Whilebothhensandducksbenefitthegardenbyeatingpests,hen
3、sareknowntodamageherbandgrassbeds.Ducks,ontheotherhand,willsearchforinsectsandsnailsmorecarefully.Onlyverydelicateplantsareatriskfromthebroad,webbedfeetofducks.Likeallwaterbirds,ducksneedaccesstowater,andduckkeeperstypicallyprovidethisbybuildingapond.Somethingthislar
4、geisnotabsolutelynecessary,however;ducksneedonlytobeabletodiptheirheadsinthewatertokeeptheirnostrilsclean.Ifapondisprovided,though,itisimportanttokeepducklingsawayfromituntiltheyareoldenoughtowithstandthecooltemperatureofthewaterabouteightweeks.Whenkeepingducks,oneha
5、stoconsiderjusthowmuchthelandwillsupport.generallytheruleis100ducksperhalfhectare.Ifmorethanthisproportionisintroduced,thereisariskofcompactingthesoil,whichcanleadtomuddyconditionsforlongperiodsastherainisnoteasilyabsorbedintotheground.Whileducksoffermanyadvantagesov
6、erhens,theymustbegivengreaterquantityoffood,especiallyifregulareggsaredesired.anadultduckwilleatbetween170to200gramsoffoodaday.iftheduckshaveaccesstograssandapond,theywillbeabletofindforthemselvesapproximately70%oftheirdailydietary,requirementsinwarmermonthsbutlessth
7、anhalfthatincoldertimes.Thereforeitisimportantthattheybefedenoughfood,suchasgrain,everyday.Experiencedduckkeepersraiseducklingseverythreeyearsorsobecauseitisafterthisperiodoftimethatducks,egg-layingpowersbegintoseriouslyweaken.Iftheaimistohatchducklings,keepersshould
8、beawarethatnotallducksmakegoodmothers,andthatcertainbreedsofduckappeartobeworsethanothers.Thepoormothersabandontheireggsafewdaysaft