大学英语三13秋辅导

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1、大学英语三13秋辅导2013下半年大英3考前辅导Passage1CCDACTodayapilotistotallydependentonwhattheairtrafficcontrolleronthegroundtellshim.Hecannotseeenoughtobesafe.Flightwatchisaninstrumentintendedtohelphim.Onascreeninfrontofthepilot,therewillbeamapoftheairspacearoundtheplane.Thepilot’s

2、ownflightlevelorheightandhisownplaneatthecentreofthescreenwillshowup.Onthemapanyotherplanesintheairspacewillappearasblobs（点状）oflightwith“tails”showingthedirectionoftheirflight.Theflightwatchmapisunusual,fortheotherplanesarenotshownattheirtrueranges（范围）,butattheird

3、istanceawayinflyingtime.Thatgetsovertheproblemoffastplanesbeingtoofarawaytobeseenbutlikelytomakecontactinsecondsandslowplanesthatarecloseenoughtobeseenbutsoslowthatthere’snochanceofcontactfor,say,tenminutes.Thepilotwillbeabletoseeonthescreenwhetheranotherplane’sco

4、urseconflictswithhisown.Thescreenwillshowhimtheflightnumberoftheotherplane,sohecancontactairtrafficcontrolandaskthemabouttheotherplane’scourse,thenhecantakeavoidingactionifnecessary.Thescreenwillshowhimwhetherhisactionputshimindangerfromyetanotheraircraft.Technica

5、lly,thesystemwillbequitecomplex.Computerswillbenecessaryonthegroundandineachaircrafttoenableflightwatchtocollectdataabouttheplanes’coursesandtocalculatethedistancesbetweenplanes.Butsuchsmallcomputersarenowquitecheap,simpleandreliable.CCDAC1.Apilotisdependenton____

6、___forhissafeflight.A.flightwatchB.theairtrafficcontrollerintheplane27/27大学英语三13秋辅导C.thecommandoftheaircontrolleronthegroundD.thepilothimself2.__________canhelpthepilottokeepcontactwiththeairtrafficcontroller.A.acomputerB.thescreenC.flightwatchD.thepassagedosen’tm

7、entionit3.Theflightwatchis_________touse.A.quitesimpleB.quitecomplexC.expensiveD.notmentioned4.themaincomponentsoftheflightwatchare__________.A.ascreenandcertaincomputersB.computersC.aflightwatchmapandsmallcomputersD.blobsandtails5.Thecomputersare_________.A.large

8、B.neitherlargenorsmallC.smallD.notmentionedPassage2DCDDDFormostpeople,lifeiseasierandmorecomfortablethaneverbefore.Conveniencefoods27/27大学英语三13秋辅导fromth