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ComprehensionAAstoryToday,webeginwithastoryabouttwogoodfriends:CalebandCorrine.Theyhavealotincommon.Theylikethesamebooks,enjoythesamemoviesandplaythesamesports.

But,thefriendsarealsoquitedifferentinthewaytheylivetheirlives.Corrineisaplanner.Shealwayshasa

schedule.Andshelikestomakeslists.Sheisalwaysontimeandknowsexactlywheresheisgoing.Calebisa

freespirit.

Helikesthingsunplannedandlikestoseewheretheroadtakeshim.Infact,sometimeshedoesnotknowexactlywhereheisgoing.Oneday,thesetwofriendsdecidedtogoshoppingtogether.Youmightfinditsurprisingthatsomethinglikeshoppingwouldtesttheirfriendship.Butitdid.ToCorrineshoppingisanunpleasanttask.So,shedoesitasquicklyaspossible.Shegoestostoresassoonastheyopen.Andshebuysonlywhatsheneeds.ToCalebshoppingisan

adventure!Helikesto

linger

infrontofstorewindows.Helooksattheobjectsforsaleforalongtimewithoutevensteppinginsidethestore.Thisactivity,thatispopularwithsome,iscalledwindowshopping.1.But,thefriendsarealsointhewaytheylivetheirlives.A.thesameB.quitedifferentC.differentD.love2.Youmightfinditsurprisingthatsomethinglikeshoppingwouldtest.A.theirfriendshipB.homeworkC.hardworkingD.costmoney3.Helooksattheobjectsforsaleforwithoutevensteppinginsidethestore.A.amomentB.sometimeC.afewminutesD.alongtimeBFreeSpaceOpticalCommunicationsAprojectbyGoogle'sparentcompanyAlphabethassuccessfullyusedlight

beams

tosendhigh-speedinternetsignalsacrosscommunitiesinIndiaandAfrica.Thelatestprojectisoneofseveralthataimstoprovideinternetservicestounderserved,ruralareasaroundtheworld.

Alphabettaara項(xiàng)目的工人們正在安裝接收空氣中高速數(shù)據(jù)信號(hào)的光束的設(shè)備。(照片編號(hào)/字母表/x)Another,runbySpaceXchiefElonMusk,uses

thousandsofsatellites

toprovideinternet

access

worldwide.SocialmediaserviceFacebookhasalsolookedatbringinghigh-speedinternettoruralcommunities.Oneofits

possiblesolutions

involvesaircraft-basedsystemstobeaminternetsignalstotheground.Indevelopedcountries,high-speedinternetaccessisprovidedbyfiber-optic

cables.Infiber-opticsystems,lightsignalsarecarriedoverlongdistancesusing

fibers

coveredbycables.Thesesystemsarehighlyeffective,buttheycanbeextremelycostlyandrequiremajordeploymentoperations.Forthisreason,manypartsoftheworld--especiallyruralandunderdevelopedareas--arenotabletobuildandoperatefiber-opticnetworks.Theprocesscanalsobecostlyandcomplexinsomecityenvironmentsaswell.Thispreventsmillionsofpeopleacrosstheworldfromhavingaccesstotheinternetandallthatitoffers.ThenewsystembeingtestedinIndiaandAfricaoffersapartialsolutiontothisproblem.ItwasdevelopedbyAlphabet's

Xdevelopmentteam,alsoknownasthe"moonshotfactory."Likefiber-optics,thesystemuseslighttocarryhigh-speedinternetsignals.Butthelighttravelsasbeamsthroughtheair,withouttheneedforfiberorcables.Thebeamscan

transmit

high-speeddatabetweentwopointswiththehelpofreceivingdevicesattachedtostructures.ThetechnologyiscalledFreeSpaceOpticalCommunications(FSOC).4.Whatisthepassagemainlytalkabout?A.Buildingoffiber-opticnetworksB.InternetdevelopingC.ThetechnologyofcountriesD.Light5.Whatdidthewritermainlyconsiderofthesystem?.Thesesystemscanbeextremelycostlyandrequiremajordeploymentoperations.ThesystemischeapThesystemiseffectiveThesystemgoeswellWhodevelopthesystem?Alphabet's

YdevelopmentteamAlphabet's

Xdevelopmentteam

AgriculturedevelopmentteamElonMuskWhydopeoplelikethetechnology?ThetechnologyiscalledFreeSpaceOpticalCommunications(FSOC).Thispreventsmillionsofpeopleacrosstheworldfromhavingaccesstotheinternetandallthatitoffers.Infiber-opticsystems,lightsignalsarecarriedoverlongdistancesusing

fibers

coveredbycables.D.Thelatestprojectisoneofseveralthataimstoprovideinternetservicestounderserved,ruralareasaroundtheworld.CArichcityDubaiisarichcitythatrunsonlow-paidmigrantlaborfromAfricaandAsia.WorkersinDubaihavefewprotections.Theydependonsponsorswhoguaranteetheirworkvisas.KarenYoungiswiththeMiddleEastInstitute,aresearchgroupinWashington,D.C.Shesaidthevisasponsorsareusuallyresponsibleformistreatment.Shesaid,"That'swherepeoplefeelthey'reunabletochangejobsorevento

complain

aboutworkingconditions."OnDubai'sstreets,morethan12deliverydriverswhospoketotheAssociatedPresssaidtheyknewoftwoorthreeco-workerswhowerekilledeverymonth.Manysaidtheyhavebadmemoriesofseeingcoworkerskilled.Dubairecorded448deathsfromcaraccidentsin2019.Therearenotyetofficialnumbersfor2020.Butsafetyactivistssayatleast70deliveryriderswerehospitalizedlastyearinDubai,including24whodied.Thestate-linkedEmiratinewspaperTheNationalreportedthat12deliveryriderswerekilledinApril.Apoliceofficialhassaid,"Whenmoneycomesintothe

equation,safetyisputaside."CompanieslikeDeliveroo,basedinBritain,andTalabatuseothercompaniestoprovidethemwithdriversandvehicles.IndustryexpertssaydeliverydriversinDubaioftenlackprotectiveequipmentandsafetytraining.Thecompaniesprovide$27amonthforvehicleservicesandrepair.Dubai'sRoadandTransportationAuthoritytoldTheAssociatedPressthatsafetyremainsmostimportantasitsupportsthedeliverymarket'sgrowth.Officialssaidtheyhaveissuednewruleslikereducinghowfardriverscanride.Whatisthemainideaofthepassage?TheworkconditionofDubaiThepeopleofDubaiAwellcityaboutDubaiAnewspaperWhatdotheworkexpectforthework?highsalaryApeaceworkplaceAgoodcompanyShesaidthevisasponsorsareusuallyresponsibleformistreatmentButsafetyactivistssaid,HowmuchdeliveryriderswerehospitalizedlastyearinDubai,including24whodiedatleast?60807010011.Whataboutthepriceforvehicleservicesandrepair?A.Thecompaniesprovide$27amonthforvehicleservicesandrepairB.Thecompaniesprovide$7amonthforvehicleservicesandrepairC.Thecompaniesprovide$7amonthforvehicleservicesandrepairD.Whenmoneycomesintothe

equation,safetyisputasideDFumiakiTakahashiisanengineeringprofessoratOhio'sCaseWesternReserveUniversity.In2019,hepublishedareportabouttheeffectivenessofwrapsusedforwildfireprotection.Hesaidthey"demonstratedboth

remarkable

performanceandtechnicallimitations."Thewrappingismosteffectiveifawildfiremovesquicklybeyondthestructure,hesaid.Itislesseffectiveinareaswithmanyhouses.Thewraps"showpromiseinbeingeffective,"hesaid.Butadditionalresearchisneededtodevelopmoreeffectiveandlightweightversions,TakahashisaidinanemailtoTheAssociatedPress.Hesaidhewouldnotsuggesttheproductsforusebyeveryonebecausewrappingcorrectlyisstillacomplexprocess.But,onceadependablewrappingmethodisinplace,hesaid,hewouldcallforwiderpublicuse.FirezatInc.sellsitsfirewraprollsfor$700each.Theyare1.5meterswideby61meterslong.Gettingastructurewrappedusuallycoststhousandsofdollarsforlabor.Hirningsaidmostindividualbuyershehashadovertheyearsarelookingtoprotect,inhiswords,"really

expensive

homes."Theyincludehomeow

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