（广东专用）2014届高考英语一轮复习方案 作业手册（12） Unit 2　Healthy eating（含解析） 新人教版必修3.doc

《（广东专用）2014届高考英语一轮复习方案 作业手册（12） Unit 2　Healthy eating（含解析） 新人教版必修3.doc》由会员上传分享，免费在线阅读，更多相关内容在教育资源-天天文库。

1、课时作业(十二)　[必修3　Unit2　Healthyeating](限时：45分钟)　　　　　　　　　　　　　　　　　　　Ⅰ.语法填空Vitaminsarecomplexchemicalsubstances1.________(find)inmanyfoods.Thehumanbodyneedsthemforhealthand2.________(grow).Thebodymakessomevitamins,3.________usuallyinamountstoosmalltomeetitsn

2、eeds.4.________vitaminsarenotmadeinthebody.Thesemustbesupplied.Nooneknowsexactly5.________allvitaminswork.Doctors6.________knowthatvitaminshaveveryspecialuses.Onevitamin7.________cannottaketheplaceofanother.Thesteadyabsenceofonevitaminin8.________othe

3、rwisecompletedietcausesadeficiencydisease.Rickets,scurvy,andpellagraareexamplesofdeficiencydiseases.Itisbesttoobtainvitamins9.________eatingthefoodsinwhichtheyoccur.Therearealsopillsthatcontainasinglevitaminoracombinationofvitamins.Peopleshouldconsult

4、10.________doctorsbeforetheytakeanyvitaminpills.Ⅱ.阅读理解AYouknoweatingfruitandvegetablesdoesgood.Butdoyouknowitcanalsomakeyoulookgood?Peoplewhoincreasedtheirintakeoverjustsixweeksdevelopedahealthyglowandappearedmoreattractive,researchersfound.Scientists

5、atStAndrewsUniversityfoundeatingthemslightlyincreasedyellowandredpigmentsinthevolunteers'skin.Theymonitoredthefoodintakeof35peopleandtookpicturesoftheirfaces,armsandhandsusingasensitivecameraatthestart,andafterthreeandsixweeks.Increasingtheirintakeofg

6、reensby2.9portionsadaywasfoundtomakethepersonlookmorehealthyandanextra3.3portionscouldenhancetheirattractiveness,whentheirphotographswereratedbyothers.Fruitandvegetablesarerichincarotenoids(类胡萝卜素),whichareknowntoprotectagainstcelldamagefrompollutionan

7、dUVrays,andcanalsopreventagerelateddiseasesincludingheartdiseaseandcancer.Butwhileitwasknowneatingextremeamountsofcertainvegetablessuchascarrotscouldturnskinorange,itwasnotknownasmallincreasewasperceptible(被觉察)toothersandwasseenasappealing.Acamerameas

8、uredchangestotheskin'sredness,yellownessandlightness,andfounditsignificantlychangedinpeoplewhonaturallyincreasedtheirintake.Thesechangeswerenotevidentinthreeweeks.Usinglightsensors,theresearchersshowedtheseredandyellowhueswerelinkedwiththeleve