備用-閱讀新人教版必修二unit3computers-whoami省公開課金獎(jiǎng)全國(guó)賽課一等獎(jiǎng)微課獲獎(jiǎng)

Unit3Computers

READINGWHOAMI?1/21Lead-in（Guess!

）Atoy?Ahandbag?Computers2/21

Iamveryoldnow.IwasborninChina.Manypeopleusedmeforcalculatinginthepast,butnowIamabitlonelybecausetheydon’tlikemenow.

DoyouknowwhoIam?abacusGuessmore:3/21

Iamverysmall.Icanbeusedforcalculating.InChina,alotofstudentsusemewhensolvingmathematicalproblems.DoyouknowwhoIam?calculator4/21

Icanbeusedforcalculating.

Besides,IcanalsobeusedforwatchingDVD,sendinge-mailandcommunicatingthroughtheInternet.However,IamnotaPC,becauseI’msmallenoughforyoutotakemewithyou.LaptopDoyouknowwhoIam?5/21AhugecomputerAPCthehistoryofthecomputerPDA

abacuslaptopcalculator6/21

WhoamI?

7/21Pre-reading

1.Whoisthespeaker?2.What’sthepassageabout?It’saboutthehistoryof

computer.3.Inwhichorderisthetextwritten?AccordingtothetimeItisacomputer.8/21FastingreadingtogetgeneralideasReading9/211642182219361940s

1960s1970s

nowThecomputerbeganasacalculatingmachine．AlanTuringwroteabooktodescribehowcomputerscouldbemadetowork．Computershadgrownaslargeasaroom.Computerswereusedinofficesandhomes．

Computersconnectpeopleallovertheworld

together.TheAnalyticalMachinewasmadebyCharlesBabbage.Thefirstfamilyofcomputerswasconnectedtoeachother.10/21CarefulreadingtogetdetailedinformationReading11/21Paragraph1Paragraph2Paragraph3TopicsentenceSupport-ingdetailsOvertimeIhavebeenchangedquitealot.Thesechangesonlybecomepossibleasmymemoryimproved.Sincethe1970smanynewapplicationshavebeenfoundforme.●●●●●●●●●●●●●●●●●calculatingmachineanalyticalmachineuniversalmachinePClaptoptubestransistorschipsnetworkWorldWideWebcommunicationsfinancetraderobotsmobilephonesoperationsspacerockets12/21TrueorFalseAlanTuringbuiltanAnalyticalMachinetosolveanymathematicalproblems.Peoplebegantorealizethatthecomputergotclevererandquickerwithtimepassing.Thecomputerbegantoservethehumanracesinceitwasbroughtintopeople’shomes.Sincethe1970s,thecomputerwasusedbypeoplearoundtheworldthroughtheInternet.5.Thelargerthecomputeris,themorememoryithas.FTFTFauniversalmachineitsbirthIbecamesmallandthinbutIgotclevererandcleverer,quickerandquicker.AndmymemorybecamesolargethatIcouldn’tbelieveit!13/21SummaryofthetextReading14/21

Ibeganasa

________________

in1642.In1822Iwasbuiltasan_________________.

In1936AlanTuringbuilta_______________.

Astheyearshave________,Ihavebeenmade_______________,butIgot_____________,______________

.calculatingmachineanalytical

machineuniversal

machinegone

bysmaller

andsmallerclevererandclevererquickerandquickerFillintheblanks:15/21

In

the1960s

theygave

me

afamily__________________.Iwas___________________

inthe1970s.SincemybirthIhavetrulybeenbuilttoservethehumanrace.broughtintopeople’shomesconnectedbyanetwork16/21

Discusswithyourpartnerstolist

some

advantages

and

disadvantagesof

the

Internet.Discussion17/21Advantages：(1)communicatewithfriends(2)listentothemusic(3)seefilms&watchnews(4)playgames(5)doshopping(6)savealotoftime(7)doalotofusefulthingsOurlifehaschanged!18/21Disadvantages：(1)Somepeopleespeciallytheteenagersareaddictedto(癡迷）thecomputer

games

andchattingontheInternet.As

aresult，theyhavelittletimetostudy.(2)Somepeopleusethecomputerwrongly.19/21Conclusion

Thereisnodoubtthatcomputerhastwosides,too.Ifwemakegooduseofit,it