小学、初中、高中各种试卷真题知识归纳文案合同PPT等免费下载www.doc985.com课时作业(十一)Unit4SectionⅡGrammarandusage&IntegratedskillsⅠ.阅读理解ASomeday,umbrellasmaydomorethanjustkeeppeopledry.AresearcherintheNetherlandshasdesignedasimplesensor(传感器)that“listens”torain.Andthatsensorcanturnanumbrellaintoarainmeasuringexpert.Toolslikethiscanletanyonegaugetheweather.Thatcanhelpscientistsmakesurethatsatellitesandradar(雷达)systemsthattrackstormsaredoingagoodjob.“Rainradarisabeautifulwayofseeingwhererainfallisupintheair.Butyouneverknowwhereithitstheground，”saysRolfHut.Hedesignedtheumbrellasensor.Researcherswanttoknowhowmuchrainmakesittotheplanet'ssurface.Notallrainthatfallsfromacloudreachestheground.Anditcanbedifficultforradarandsatellitestomeasurethatrain,particularlyincities.Ahostofbigbuildingscanchangehowairandrainmoveduringastorm.“Italsoexplainswhyasingle,expensivesensor—thekindthatmightbefoundatanofficialweatherstation—won'tgiveaccuratecitywidedata，”Hutsays.Butbyputtingalow-costrainmeasuringtoolintopeople'shands,scientistscanlearnmoreabouthowmuchrainfalldiffersintheseandotherhardtomeasureplaces.Ontheinsideoftheumbrellaisasmall,yellowdisk(磁盘).Itistherainfallsensor.ThesensorisattachedtoablackBluetoothheadsetthatsendsthecollecteddatatoasmartphone.Hutcameupwiththeideatostickthesametypeofsensoronanumbrellawhenhewastalkingtokidsaboutscience.Heshowedthemaphotoofapolicemanwhowasholdinganumbrellaandtalkingtoacrowdintoamicrophone.Whynotputthetwotogether?Hethoughtitcouldmakeacoolrainfallsensor.Whenthedataofastormcamethrough,Hutcomparedtheumbrella'snew“ear”forraintoofficialrainmeasuringequipment.Andtohisdelight,hefoundtheumbrella'smeasurementswereprettygood.Hisnextstepistoimprovetheumbrellasensortobemoreaccurate.1．Thepurposeofthispassageisto________．A．promoteauniqueumbrellaB．informusofanewinventionC．makereadersinterestedinscienceD．praisearesearcherforhisinvention2．Theunderlinedword“gauge”inParagraph2mostprobablymeans“________”．A．changeB．controlC．measureD．sense3．Whycanitbehardforofficialweatherstationstomeasuretherainincities?A．Theircollecteddatacannotbesenttosmartphones.B．Theyarelackinginweathermeasuringequipment.C．Rainfalldiffershugelydependingonvariousareas.D．Bigbuildingsinfluencethemoveofairandrain.4．WhatdoweknowaboutHut'snewinvention?小学、初中、高中各种试卷真题知识归纳文案合同PPT等免费下载www.doc985.comA．Hutisnotsatisfiedwithhisnewinventionatall.B．Hut'sinventionissomethingusefulbutexpensive.C．Hutwillpaymoreattentiontotheaccuracyofthesensor.D．ApolicemanintherainhelpedHutwiththeinvention.BThere'snothingmagicalaboutthenumber10，000.Infact,theideaofwalkingatleast10，000stepsadayforhealthgoesbackmanyyearstoamarketingcampaignstartedinJapanforthesaleofpedometers(计步器).And,intheyearsthatfollowed,itwasacceptedintheUSasagoaltopursuegoodhealth.It'softenthedefaultsetting(默认设置)onfitnesstrackers,butwhat'sitreallybasedon?“Theoriginalbasisofthenumberwasnotscientificallydetermined，”saysIMinLee,aresearcherofBrighamandWomen'sHospital.Shewascurioustoknowhowmanystepsweneedtotakeadaytomaintaingoodhealthandlivealonglife,sosheandherworkmatesdesignedastudythatincludedabout17，000elderlywomen.Theiraverageagewas72.Thewomenallagreedtoweardevicestotracktheirstepsastheywentabouttheirdaytodayactivities.Itturnsoutthatwomenwhotookabout4，000stepsperdaygotanincr...