专业英语四级（阅读）模拟试卷23（共172题）.pdf

专业英语四级（阅读）模拟试卷23共（

9套）

共（172题）

专业英语四级（阅读）模拟试卷第1套

一、常规阅读理解含（5小题）本（题共20题，每题

1・0分,共20分。）

Thecommunicationsexplosionisonthescaleoftherail,automobileortelephone

revolution.Verysoonyoullbeabletorecordyourentirelifeelectronically——anythinga

microphoneoracameracansenseyoullbeabletostore.Inparticular,thenumberof

imagesapersoncapturesinalifetimeissettoriseexponentially.Thethousandimagesa

yearItakeofmychildrenonadigitalcameraareallprecioustome.Inagenerations

（ime,mychildrenschildrenwillhavetotalimagedocumentationoftheirentirelives—a

visuallogoftremendouspersonalvalue.Bythenwellbewrestlingwithanother

uestion;howwecontrolalltheelectronicdevicesconnectedtotheInternet:trillionsof

PCs,laptops,palmpilots,cellphonesandothergadgets.InCambridge,werealready

workingonmillimeter-suarecomputingandsensingdevicesthatcanbelinkedtothe

Internetthroughtheradionetwork.Thissortofconnectivitywillexpanddramaticallyas

microscopiccommunicationsdevicesbecomedirt-cheapandmultiply.Justimaginewhat

thepaintonthewallcoulddoifithadthissortofcommunicationsdustinit:change

color,playmusic,showmoviesorevenspeaktoyou.Fallingcostsraiseother

possibilitiestoo.Becauselaunchingspacevehiclesisabouttobecomeverymuch

cheaper,（henumberofsatellitesislikelytogoupexponentially.Thereslotsofspaceup

（heresowecouldhavemillionsofthem.Andifyouhavemillionsoflow-orbitsatellites

youcanestablishaglobalcommunicationsnetworkthatcompletelydoesawaywith

towersandmasts.Ifthesatellitesworkedonthecellularprinciplesoyougotspatialreu