吉林省长春一五O中高一七选五专题英语测试(附答案)[003].doc

吉林省长春一五O中高一七选五专题英语测试(附答案)ManyregionsinChinahaveintroducedCOVID-19vaccination(接种疫苗)amongchildrenaged3to11.Kidsareencouragedtotakeitandtheprojectisprogressing,whichmightbeimportanttostoppingthespreadofthecoronavirus.____1____Whydochildrengetthesamedosage(剂量)asadults?Whenchildrengetsick,theyaregenerallygivenareduceddosage.ManyparentsareworriedthatthesameCOVID-19vaccinedosagewillbeaburdenonthesmallbody.Sothereisneedforproperdoseinchildren.____2____.Theprocessofvaccinestakingeffecthasnorelationwiththeweightandbodysurfaceareaofthereceiver.Infact,forthemajorityofvaccines,therecommendeddosesforbothbabiesandadultsarethesame.Canchildrenhavefullimmunity(免疫力)afterreceivingtheCOVID-19vaccine?Someparentsdoubtwhethervaccinatingchildrenaged3to11canproducethedueimmuneeffectastheirimmunesystemsarestilldeveloping.Actually,vaccinescanworkexactlythesameinbothchildrenandadults.Thevaccinewillproduceanear100percentimmuneresponseinchildren.____3____SothesamevaccinationstrategyhasbeenadoptedforallagegroupsinChina.____4____Avaccinehastogothroughastrictprocedurebeforebeingwidelyusedinaspecificagegroup.Enoughdataneedtobecollectedtogetemergencyuseorcomeontothemarket.Sothemedicalexperimentshavetobeconsideredinadvance.Chinahascarriedoutaseriesofsuchstudies.Basedonresearchresnlts,theriskofnegativereactionsinchildrenisnohigherthanthatofadults.____5____.Sofarthemostfrequentlyreportedthreenegativereactionsarefever,painandtiredness.Atpresent,thegovernmentisplanningtostudychildrenasyoungas6monthsoldinthefuture.A．Willthevaccineworkonchildrenforever?B．IstheCOVID-19vaccinesafeforchildren?C．Theviruswaseithercarriedbyapersonorwithgoods.D．However,thewaythevaccinesworkdiffersfromthatofotherdrugs.E．Someparentsfindthemselveshavingquestionsaboutthevaccination.F．Thishasalsobeenprovedtrueinmedicalexperimentsondifferentagegroups.G．TheCOVID-19vaccinationforchildrenaged3to11hasbeeninprogressforsometime.Manypeople,especiallyparentswiththeirchildren,visitzoosforpleasure.It’sinterestingtoseenativeanimalsupcloseorcreature