新概念英语第四册第1315课练习及答案文档格式.docx
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b.usethecoringbit
c.takenoteofthestratabelowthesurface
d.bringupspecimenmaterialfromtimetotime
4Ifyoudon'
tcontroltheoilpressure________.
a.oilwillbeforcedtothesurfacewithgreatforce
b.mudwillhavetobecirculateddownthedrillpipe
c.youwillhavetocatchtheoilatthesurface
d.waterwillgushtothesurface
Structure句型
5Theholesmadeforoilgodownas______as25,000feet.(1.1)
a.many
b.long
c.far
d.distant
6Nothinghasdoneas_____astoimprovedeepdrillingasthesearchforoil.(11.3-4)
b.much
c.long
d.far
7Thegeologistneedstoknow______rocksthedrillhasreached.(1.8)
a.that
b.when
c.how
d.which
8_____wegetdowntotheoil,itusuallyflowswithgreatpressure.(1.10)
a.Immediately
b.Thefirsttime
c.Until
d.Aslongas
Vocabulary词汇
9Theholesareonlyborings,lessthanafoot_____.(11.2-3)
a.round
b.across
c.through
d.along
10Theengineatthetopmakesthedrillpipego______.(1.6)
a.upanddown
b.inandout
c.roundandround
d.deeperanddeeper
11______asampleisobtainedwithacoringbit.(11.8-9)
a.Everynowandagain
b.Inonewayoranother
c.Oftenbutnotalways
d.Afteralongtime
12We_____avoidtheold,romanticideaofagusher.(1.12)
a.makesurewe
b.can'
t
c.attempt
d.tryto
课后习题答案:
Unit13ACDACBDABCAD
【篇二】Unit14课后习题
1Thereasonit'
shardtoforecasttheweatheristhat______.
a.conditionsrapidlydeteriorate
b.thereisalwaysturbulence
c.onlysatelliteshaveapanoramicviewofconditions
d.theeffectoftinychangescannotbedetectedorcalculated
2Evenwithgridpointswhicharesixtymilesapart,forecasters_____.
a.havetodependonsatellitesforinformation
b.havetomakeassumptionsaboutsomeofthedata
c.workonmodernweathermodels
d.preventerrorsfrommultiplying
3Whichofthesestatementsistrue?
a.Theonlywaytosolvetheproblemistohavesensorsspacedatone-footintervals.
b.Theonlywaytosolvetheproblemistohaveinfinitelypowerfulcomputers.
c.Theonlywaytosolvetheproblemistohaveperfectlyaccuratereadings.
d.Atpresent,thereisnowayofmakingabsolutelyaccuratepredictions.
4Tinyvariationsintemperature,pressureandhumidity_____.
a.willbepickedupbysensorsatone-minuteintervals
b.areusedtopredicttheweatheronemonthahead
c.canleadtocompletelyunexpectedweatherconditions
d.produceexpectedresults
5Generallyspeaking,anyprediction______rapidly.(1.2)
a.isdeteriorating
b.hasdeteriorated
c.willdeteriorate
d.haddeteriorated
6Onlysatellites_______seecontinent-sizefeatures.(11.5-6)
a.areableto
b.could
c.arepossible
d.arecapable
7_____theearthcouldbecoveredwithsensors.(11.9-10)
a.Providingthat
b.Onconditionthat
c.Say
d.Allowingthat
8Thecomputerwillbeincapable______whetherPrincetonwillhavesunorrainonemonthaway.(11.13)
a.predict
b.topredict
c.ofpredicting
d.predicting
9Theworld'
sbestweatherforecastsarebasedon_______.(1.1)
a.certainknowledge
b.guesswork
c.scientificfacts
d.accuratecalculation
10Themodernweathermodelsworkwitha_____ofpoints.(1.7)
a.scale
b.balance
c.line
work
11‘Humidity’refersto______.(1.11)
a.light
b.watervapour
c.pressure
d.heat
12Aninfinitelypowerfulcomputertakesinallthedataand_____whatwillhappen.(11.11-12)
a.predicts
b.foretells
c.estimates
d.worksout
课后习题答案:
Unit14DBDCCACCBDBD
【篇三】Unit15
课后习题
1Fearofindustrialespionage______.
a.leadstolackoffreedominscientificresearch
b.especiallyappliestoscientificresearchofageneralandfundamentalnature
c.canleadtosecrecyinscientificresearch
d.createsanatmosphereofdistrustinbusiness
2Whichofthesestatementsistrue?
a.Somekindsofscientificresearchare‘moresecret’thanothers.
b.Allkindsofscientificresearcharetopsecret.
c.Firmsnevertellanyoneanythingabouttheirscientificresearch.
d.Scientificresearchworkersneverspeaktoeachother.
3Firmswanttobesure______.
a.theylimitallthoseengagedincarryingoutscientificresearch
b.thatlargercompaniescan'
tfindoutabouttheirscientificresearch
c.theyareworkinginanatmosphereofcompletesecrecy
d.theyowntherightstointellectualpropertybeforetheyrevealwhatthey'
redoing
4Thepossibilityofmakingdiscoveriesbyaccident______.
a.makeitdifficulttoobtainscientificbooksfromlibraries
b.encouragescompetitionfromotheragents
c.increasestheneedforsecrecy
d.meansthateverydiscoveryhastobepatented
5Oneisthegeneralatmosphereofsecrecy______.(11.1-2)
a.whichitiscarriedout
b.whichiscarriedout
c.itiscarriedout
d.itiscarriedoutin
6______anyinquiryisasecretone,itnaturallylimits-(1.3)
a.Withregardto
b.Aswellas
c.Supposingthat
d.Totheextentthat
7Someofthebiggerfirmsareengagedinresearcheswhichare______generalthatitisapositiveadvantagetothemnottokeepthemsecret.(11.6-7)
a.such
b.so
c.sothat
d.inorderthat
8They______evenmoreprocessesassecretprocesses.(11.8-9)
a.keep
b.kept
c.arekept
d.arekeeping
9Thereisthe______offreedomoftheindividualresearchworker.(1.2)
a.loss
b.emptiness
c.absence
d.luck
10Itnaturallylimitsallthoseengagedin______.(1.3)
a.performingit
b.involvingit
c.betrothedtoit
d.allowingit
11Itis______nottokeepthemsecret.(11.6-7)
a.withtheirknowledge
b.ontheiraccount
c.intheirbestinterests
d.fortheirbenefit
12Sometimesthesecrecygoestosucha______that...(1.1.10-11)
a.degree
b.process
c.limit
d.period
Unit15CADCDDBACACA