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大小:114.50 KB
页数:81页
时间:2017-12-02
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1、黄金29篇真题经典难句收集1.Onlythelastofthesewassuitedatalltothecontinuousoperatingofmachines,andalthoughwaterpoweraboundedinLancashireandScotlandandrangrainmillsaswellastextilemills,ithadonegreatdisadvantage:Streamsflowedwherenatureintendedthemtoandwater-drivenfactorieshadtobelo
2、catedontheirbankswhetherornotthelocationwasdesirableforotherreasons.2.Earlyinthecentury,apumphadcomeintouseinwhichexpandingsteamraisedapiston(活塞)inacylinder(汽缸),andatmosphericpressurebroughtitdownagainwhenthesteamcondensedinsidethecylindertoformavacuum.3.Thefinalstepc
3、amewhensteamwasintroducedintothecylindertodrivethepistonbackwardaswellasforwardtherebyincreasingthespeedoftheengineandcuttingitsfuelconsumption.4.Coalgasrivaledsmokyoillampsandflickeringcandles,andearlyinthenewcentury,well—to—doLondonersgrowaccustomedtogaslightshouses
4、andevenstreets.5.Ironmanufacturerswhichhadstarvedforfuelwhiledependingoncharcoalalsobenefitedfromever-increasingsuppliesofcoal;blastfurnaceswithsteam-poweredbellowsturnedoutmoreironandsteelforthenewmachinery.6.Atthesametime,operatorsofthefirstprintingpressesrunbysteam
5、ratherthanbyhandfounditpossibletoproduceathousandpagesinanhourratherthanthirty.7.Insomeindustrialregions,heavilyladenwagons,withflangedwheels,werebeinghauledbyhorsesalongmetalrails;andthestationarysteamenginewaspuffinginthefactoryandmine.8.Anothergenerationpassedbefor
6、eInventorssucceededincombiningtheseingredientsbyputtingtheengineonwheelsandthewheelsontherails,soastoprovideamachinetotaketheplaceofthehorse.9.WhenhegrewolderWilliamSmithtaughthimselfsurveyingfrombooksheboughtwithhissmallsavingsandattheageofeighteenhewasapprenticedtoa
7、surveyorofthelocalparish.10.Thecompaniesbuildingthecanalstotransportcoalneededsurveyorstohelpthemfindthecoaldepositsworthminingaswellastodeterminethebestcoursesforthecanals.11.HelaterworkedonsimilarjobsacrossthelengthandbreadthofEnglandallthewhilestudyingthenewlyrevea
8、ledstrataandcollectingallthefossilshecouldfind.12.Butasmoreandmoreaccumulationsofstratawerecatalogedinmoreandmoreplaces,itbe
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