2023届高考英语二轮拔高复习训练：阅读理解说明文(五).pdf

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年英语二轮拔高班复习资料

阅读理解训练题型：说明文题组训练（五）

姓名：班级：学校：错题号：

（2022·福建厦门·校联考模拟预测）Ourplanetishometomanyradioactivesubstances-notjustinisgeologicinnardsbutalsoinitshospitals,atitsindustrialsitesandinitsfood

processingplants.InColorado,forinstance,27buildingshousescary-soundingchemicalelementssuchascesium137andcobalt60.Thesematerialsarenotthereforrisky

purposes,though.Theyplayapartincancertreatment,bloodirradiation,medicalandfoodsterilization,structureandequipmenttesting,geologicexploration,etc.

Theradioactivematerialisnotalwaysbadinablackand-whiteway:itcanbeausefultool.Theraysgivenoffbycesiumandcobaltcankillgermsmultiplyinginyourmeatand

makeyourappleslastlonger.Radiographicinstrumentscandetect,say,cracksinacity’spipesinasimilarwaytoanx-raypickingupahairlinefractureinyourknee.Apractice

called“welllogging”usessealedradioactivesourcestomapthegeologyofholesoilseekersdrillintotheearth.Andofcourse,radiationiskeytocancertreatment.

Theriskarisesbecausethesameradioactivematerialthatisbeneficialcouldalsobestolenormisplacedandfinditswayintotraffickingringsordirtybombs.Itmightalsobarn

workersifsomethingaccidentallygoeswrongduringanormalnine-to-fiveday.In2017alone,accordingtoareportfromtheJamesMartinCenterforNonproliferationStudies,

therewere171“incidentsofnuclearorotherradioactivematerialsoutsideofregulatorycontrol”basedonopensourcereports,104ofwhichhappenedintheU.S.

AninitiativecalledRadSecure100waslaunchedtoremoveandbettersecureenergetic