人教版九年级英语上册 Unit5_阅读理解专练.doc

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1、Unit5阅读理解专练Imaginethesituation.Youaredrivingaloneinadesertoronamountain.Youhavenoideawhereyouare.Youpassedthelasthousetwohoursago.Thenyourcarbreaksdown.Itisnightanditiscold.Youhavenomobilephone.Whatdoyoudo?Well,nexttimetakeaGPSwithyou.Thisinventionmaybeabletohelpyou.Itisadevice(装置）whi

2、chusessatellitestofindtheuser’sposition(位置）.Itcanfindyourpositionwithin20metres.AGPScannotstartyourcar,butatleastyouwillknowwhereyouare.GPS,whichmeansGlobalPositioningSystem,isasmallradioreceiver.Itlookslikeamobilephone.Youcanholditinyourhand,orputitinyourpocket.Itissometimesputintoaw

3、atchoratelephone.WealsofindGPSdevicesincars,planes,orboats.Someofthesedeviceshaveelectronicmaps,soyouknowwhereyouare.Forexample，inacitytheycantellyouthenameofthestreet.TherearethreepartstotheGlobalPositioningSystem.Thefirstpartisthereceiver.Youcanholditinyourhand,orhaveitfixedintoyour

4、car,plane,etc.ThesecondpartisagroupofsatellitesorbitingtheEarth.Thereceivercontactsatleastfourofthesatellitesandcalculates（计算）itsposition.Thethirdpartofthesystemisanetworkofgroundstations.Theyareallovertheworld.Theycontrolthesatellitesandmakesuretheyareworkingwell.Somepeoplethinkthati

5、nthefuturetheGPSwillbeascommonasthemobile.Theyarebecomingcheaperandmoreandmoreaccurate（精确的）.TherearealsonewusesfortheGPS.Perhapstheywillbecomelikewatches.Everyonewillhaveoneandyouwillneverbelostagain.1.Accordingtothepassage,withthehelpoftheGPS,people______.A.can’tbelostinanewcityB.can

6、’tfindtheirwayindifferentcountriesC.canlearnaboutthecultureofanunknownplaceD.canspendtheleasttimegettingtoanotherplace2.Wecanlearnfromthepassagethat______.A.therearethreepartstotheGPSB.aGPScan’tbeputintoawatchC.aGPScanhelpyoustartyourcarD.theGPSarebecomingmoreandmoreexpensive3.Theunde

7、rlinedword“They”inparagraph3means“_______”A.ReceiversB.GPSdevicesC.SatellitesD.Groundstations4.Thepassageismainlyabout_________.A.thehistoryoftheGPSB.theintroductionoftheGPSC.theshapeoftheGPSD.thethreepartsoftheGPS5.Whatcanweinfer（推断）fromthepassage?A.AllGPSdeviceshaveelectronicmaps.B.

8、Peopl