Todayalmosteveryoneknowscomputersandtheinternet.docx

Todayalmosteveryoneknowscomputersandtheinternet.docx

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Todayalmosteveryoneknowscomputersandtheinternet

Todayalmosteveryoneknowscomputersandtheinternet.IfIaskyou"whatisthemostimportant.IfIaskyou"whatisthemostimportantinyourlife?

maybeyouwillsay"Computersandtheinternet."

Thefirstcomputerwasmadein1946.Itwasverybigbutitworkedslowly.Todaycomputersaregettingsmaller.Buttheyworkfasterandfaster.Whatcancomputersdo?

Awriterhassaid,"Peoplecan'tlivewithoutcomputerstoday."

Theinternetcamealittlelaterthancomputers.Itisabouttwenty-fiveyearslaterthancomputers.Butnowitcanbefoundalmosteverywhere.Wecanuseittoreadbooks,writeletter,doshopping,playgamesormakefriends.

Manystudentsliketheinternetverymuch.Theyoftengointotheinternetassoonastheyhaveneverseenthesefriends.Theydon'tkonwtheirrealnames,ages,andevensex.Theyaresointerestedinmakingthe"unrealfriends"thattheycan'tputtheirheartsintostudy.Manyofthemcan'tcatchupwithothersonmanysubjectsbecauseofthat.

Wecanusecomputersandtheinternettolearnmoreabouttheworld.Butatthesametime,weshouldrememberthatnotallthethingscanbedonebycomputersandtheinternet.

21,Whenthecomputerwasinvented,itwas______

A,largeandworkedquickly

B,largebutworkedslowly

C,smallandworkedslowly

D,smallbutworkedquickly

22,Theinternetwasborninabout________

A,1960B,1971C,1980D,1985

23,WhichofthefollowingisTRUE?

A,Studentskoowthefriendsontheinternetverywell

B,Fewstudentslikesurfingontheinternet

C,Studentsusetheinternettomake"unrealfriends".

D,These"unrealfriends"oftenmeeteachother.

24,Whatdoesthewriterthinkoftheinternet?

A,Itishelpful,butwecannotdoeverythingonit

B,Itcanmakestudentsworkharder

C,Itisnotgoodforstudents

D,Itiswonderful

21B

22C

23C

24A

Howcanwegetridofgarbage?

Dowehaveenoughenergysourcestomeetourfutureenergyneeds?

Thesearetwoimportantquestionsthatmanypeopleareaskingtoday.Somepeoplethinkthatmenmightheabletosolvebothproblemsatthesametime.Theysuggestusinggarbageasanenergysource.

Foralongtimepeopleburiedgarbageordumpeditonemptyland.Now,emptylandisscarce.Butmoreandmoregarbageisproducedeachyear.Butgarbagecanbeagoodfueltouse.Thethingsingarbagedonotlooklikecoal,petroleum,ornaturalgas;buttheyarechemicallysimilartothesefossilfuels.Asweuseupourfossil-fuelsupplies,wemightbeabletousegarbageasanenergysource.

Burninggarbageisnotanewidea.SomecitiesinEuropeandtheUnitedStateshavebeenburninggarbageforyears.Theheatthatisproducedbyburninggarbageisusedtoboilwater.Thesteamthatisproducedisusedtomakeelectricityortoheatnearbybuildings.InParis,France,somepowerplantsburnalmost2millionmetrictonsofthecitysgarbageeachyear.Theamountofenergyproducedisaboutthesaneaswouldheproducedbyburningalmostahalfmillionbarrelsofoil!

Butthereareproblemsinusinggarbageasafuel.Garbagethatburnseasily,suchasfoodscrapsandpaper,mustbeseparatedfrommetals,glass,andothermaterialsthatdonotburneasilyThisseparationprocessisnormallycostly.Anotherproblemisthatburninggarbagecanpollutetheair.

Ourfossilfuelsuppliesarelimited.Burninggarbagemightbeonekindofenergysourcethatwecanusetohelpmeetourenergyneeds.Thismethodcouldalsoreducetheamountofgarbagepilingupontheearth.

1.Whattwoproblemscanbesolvedbyburninggarbage?

A.Theshortageofenergy;Airpollution.

B.Theshortageofenergy;Theshortageofemptylandforholdinggarbage.

C.Airpollution;Theshortageofemptylandforholdinggarbage.

D.Airpollution;Theshortageoffossilfuel.

2.WhichofthefollowingisNOTaresultofburninggarbage?

A.Theheatproducedisusedtoboilwater.

B.Thesteamproducedisusedtomakeelectricity.

C.Thegarbageburnedisturnedintofossilfuels.

D.Thesteamproducedisusedtoheatbuildings.

3.Accordingtothepassage.Whichofthefollowingfourgroupsofgarbageisreadyforburning?

A.foodscrapsandmetalsB.paperandglass

C.metalsandglassD.foodscrapsandpaper

4.WhichofthefollowingmethodsofexpositionisNOTusedinthispassage?

A.questionsandanswersB.figurers

C.examplesD.analogy

5.Whatisthegeneraltoneofthepassage?

A.optimisticB.indifferent

C.advocatingD.anxious

答案：

BCDDC

Mostoftheillheathwesuffercouldbepreventedifpeoplemademoreefforttochangetheirlifestyles.Instead,manypeoplecontinuetosmoke,todrinkexcessivelyandtoeatunbalanceddiets.Howcangovernmentshelppeopleprotecttheirhealthandavoidprematuredeath?

Well,manyofthemeasureswhichneedtobetakenareprimarilyamatt