江苏南京外国语20232023九年级下学期阅读能力训练三及答案.docx
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1、九年级阅读能力训练(三)一、完形填空“Ruby(红宝石)!Itsarubychoco1ate!,Myschoo1matescheeredinexcitementasthey1earnedaboutanewkindofchoco1ate.SharonMin,anadmissions(招生)officerfromJacobsUniversityBremen,1ourschoo11astmonth.Afterte11ingusa1itt1ebitabouttheuniversity,she2ustorubychoco1ate,givingsomepiecestostudentswhoaskedher
2、3duringaQandAsession(环节).Iwas1uckyenoughtogeta(n)4.Iwasveryinterestedinthisnewkindofchoco1ate.Ididsomeresearchon1ineand5thatrubychoco1ateisthe6kindofchoco1ateafterb1ackchoco1ate,whitechoco1ateandmi1kchoco1ate.Rubychoco1ateisproduced7aSwisscompany.ResearchersatUniversityBremen,Germanyhavebeen8itforma
3、nyyears.After80years,theywereab1etocreaterubychoco1ate.Thischoco1atehasa1ightpinkco1or.Itissaidtobefreeofadditives(添加剂)andartificia1(人工的)co1ors.Itis9rubycocoabeans(可可豆).Thecompanythatmakesithasn,tbeenab1etota1kmuchabouthowit,sproduced,asthisisatrade10.Imsti1111abouthowitismade.Itisamazingtoseewhatpe
4、op1ehavebeenab1etomakethroughtheuseofscienceandtechno1ogy.Rubychoco1ateisjustoneofthese12.1wanttostudymateria1scienceinthefutureandmakeour1ivesbetter.AnewsuperconductorworksatroomtemperatureImaginetryingtorunthroughafie1d,buttherearea1otofthingsinyourway.Youhavetos1owdowntogetthrough.Butifthefie1dis
5、c1eared,youcou1drunasfastasyouwant.Thisishowe1ectricitygoesthroughasuperconductor(超导体).Whi1einnorma1conductorsthee1ectrons(电子)maycomeacrossmanyotherpartic1es(粒子),theyhaveac1earpath(通道)inasuperconductor.Thismeansthee1ectricitycantrave1withnoresistance(电阻)inasuperconductorandwastesnoenergy.Recent1y,sc
6、ientistssaidtheyhadcreatedasuperconductorthatcanworkatroomtemperature.Ifproventrue,itcou1dbecomeoneofthe4greatestscientificachievementsofthe21stcentury,wrotePhysicsmagazine.Thefirstsuperconductorwasdiscoveredin1911byDutchscientistHeikeOnnes.Hefoundthatmercury(汞)coo1edto-269Cwou1d1osea11resistancetoe
7、1ectricity.Sincethen,scientistshavebeentryingtousesuperconductorsindifferentareas.Onecoo1estuseisinthemag1ev(磁悬浮的)trains.Themagneticfie1ds(磁场)andsuperconductorinteract(相互作用),creatingaforcethatpushesthemagnetup.Butcurrent1y,thesuperconductoron1yworkswhenthetemperatureisvery1ow.Itmeansthepriceishighan
8、ditcannotbewide1yused.Thenewstudy,donebyscientistsfromtheUniversityofRochester,US,createdthesuperconductorwithhydrogen(M),nitrogen(氮)and1utetium(错)at21C.Itsti11requiredapressureofabout10,000timesthatofEarth,satmosphere(大气层).Butthat,sfar1owerthanthepressuretypica11yrequiredforsuperconductors.Ifthisne
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