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ID:6380772
大小:33.00 KB
页数:2页
时间:2018-01-12
《英语阅读理解与完型填空练习(4)》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、(1)Whenyoucutyourskin,youbleed(流血).Ifapersonlosesalotofblood,hewillbecomeillandmaydie.Bloodisveryimportant.Peoplehavealwaysknownthat.Atonetime,somepeopleevendrankbloodtomakethemstrong!Whendoctorsunderstandhowbloodgoesaroundinsidethebody,theytrywaysofgivingbloodtopeoplewhoneedit.Theytakebloodfromt
2、hehealthypeopleandgiveittopeoplewhoneedit.Thisiscalled"bloodtransfusion".Thebloodgoesfromthearmofthehealthypersonintothearmofthesickperson.Buttherearetwoproblems.First,itdoesnotalwayswork.Sometimespeoplediewhentheyhavebloodtransfusion.Later,doctorsfindthatwedonotallhavethesamekindofblood.Thereare
3、fourgroups—O,A,BandAB.Weallhavebloodofoneofthesegroups.TheyalsofindthattheycangiveanykindofbloodtopeopleofgroupAB.ButtheyfindthattheymustgiveA-groupbloodtoA-grouppeopleandB-groupbloodtoB-grouppeople.IhaveO-groupbloodandthedoctortoldmethatIcouldgivebloodtoanyoneelsesafely.Thereisanotherproblem.Tog
4、ivebloodoftherightkind,doctorshavetofindapersonoftherightbloodgroup.Oftentheycannotfindapersonintime.Iftheyhaveawaytokeeptheblooduntilsomeoneneedsit,theycanalwayshavetherightkindofblood.Atfirsttheyfindtheycankeepitinbottlesforfifteentotwentydays.Theydothisbymakingitverycold.Thentheyfindhowtokeepi
5、tlonger.Intheendtheyfindawayofkeepingbloodforaverylongtime.Wecallaplacewherewekeepmoneya"bank".Wecallaplacewherewekeepblooda"bloodbank".Oneday,whenyougrowup,youmaydecidetogivebloodtoa"bloodbank".Inthiswayyoumaystopsomeonefromdying.Orperhapsonedayyoumaybecomeill.Youmayneedblood.The"bloodbank"willg
6、iveittoyou.1.Fromthepassage,welearnthatsometimespeoplediewhentheyhavebloodtransfusionsbecausethey__________.A.areunhealthypeopleB.havelostalotofbloodC.arenotgiventherightkindofbloodD.areAB-grouppeople2.Whichofthefollowingistrue?________A.Doctorscangiveanykindofbloodtothewriter.B.Thewritercangiveb
7、loodtoB-grouppeople.C.Thewriterhasneverhadabloodtransfusion.D.Thewriterhasthesamekindofbloodashisfather.3.Peoplesetupthe"bloodbank"sothattheycan_____________.A.givetherightkindofbloodtothepeoplewhoneeditintimeB.keepdif
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