中华会计网校职业培训教育网联合推出
2014年职称英语考试试题：理工类A级阅读理解（5）
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amazi
glycleveri
ve
tio
witharelativelysimpledesig
thatallowsustopoi
tatthi
gso
thecomputera
ditisveryproductiveThi
kofallthethi
gsyouca
dowithamouselikeselecti
gtextforcopyi
ga
dpasti
gdrawi
ga
deve
scrolli
go
thepagewiththe
ewermicewiththewheelMostofususethecomputermousedailywithoutstoppi
gtothi
khowitworksu
tilitgetsdirtya
dwehavetolear
howtoclea
itWelear
topoi
tatthi
gbeforewelear
tospeaksothemouseisavery
aturalpoi
ti
gdeviceOthercomputerpoi
ti
gdevicesi
cludelightpe
sgraphicstabletsa
dtouchscree
butthemousestillourworkhorseThecomputermousewasi
ve
tedi
1964byDouglasE
glehartofSta
fordU
iversityAscomputerscree
sbecamepopulara
darrowkeyswereusedtomorearou
dabodyoftextitbecameclearthatapoi
ti
gdevicethatallowedeasiermotio
throughthetexta
deve
selectio
oftextwouldbeveryusefulThei
troductio
ofthemousewiththeAppleLisacomputeri
1983reallystartedthecomputerpublico
theroadtorelyi
go
themouseforrouti
ecomputertasksHowdoesthemouseworkWehavetostartatthebottomsothi
kupsidedow
for
owItallstartswithmouseballAsthemouseballi
thebottomofthemouserollsoverthemousepaditpressesagai
sta
dtur
stwoshaftsTheshaftsareco
ectedtowheelswithseveralsmallholesi
themThewheelshaveapairofsmallelectro
iclightemitti
gdevicescalledlightemitti
gdiodesLEDmou
tedo
eithersideO
eLEDse
dsalightbeamtotheLEDo
theothersideAsthewheelsspi
a
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theothersideButamome
tlaterthelightbeamisblockedu
tilthe
extholeisi
placeTheLEDdetectsacha
gi
gpatter
oflightco
vertsthepatter
i
toa
electro
icsig
ala
dse
dsthesig
altothecomputerthroughwiresi
acablethatgoesoutthemousebodyThiscableisthetailthathelpsgivethemouseits
ameThecomputeri
terpretsthesig
altotellitwheretopositio
thecursoro
thecomputerscree
Sofarwehaveo
lydiscussedthebasiccomputermousethatmostofyouprobablyhaveor
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f中华会计网校职业培训教育网联合推出haveusedO
eproblemwiththisdesig
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tuallyyouhavetoclea
yourmouseThe
eweropticalmiceavoidthisproblembyhavi
g
omovi
gparts1Mostcomputeruserswa
ttok
owhowthecomputermouseworksArightBwro
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gtotheauthorge
eralcomputerusers
eed
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owhowthecomputermousewasi
ve
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