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时间:2018-07-18
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1、黄金29篇真题经典难句收集1.Onlythelastofthesewassuitedatalltothecontinuousoperatingofmachines,andalthoughwaterpoweraboundedinLancashireandScotlandandrangrainmillsaswellastextilemills,ithadonegreatdisadvantage:Streamsflowedwherenatureintendedthemtoandwater-drivenfactorieshadtobelocatedontheirba
2、nkswhetherornotthelocationwasdesirableforotherreasons.2.Earlyinthecentury,apumphadcomeintouseinwhichexpandingsteamraisedapiston(活塞)inacylinder(汽缸),andatmosphericpressurebroughtitdownagainwhenthesteamcondensedinsidethecylindertoformavacuum.3.Thefinalstepcamewhensteamwasintroducedint
3、othecylindertodrivethepistonbackwardaswellasforwardtherebyincreasingthespeedoftheengineandcuttingitsfuelconsumption.4.Coalgasrivaledsmokyoillampsandflickeringcandles,andearlyinthenewcentury,well—to—doLondonersgrowaccustomedtogaslightshousesandevenstreets.5.Ironmanufacturerswhichhad
4、starvedforfuelwhiledependingoncharcoalalsobenefitedfromever-increasingsuppliesofcoal;blastfurnaceswithsteam-poweredbellowsturnedoutmoreironandsteelforthenewmachinery.6.Atthesametime,operatorsofthefirstprintingpressesrunbysteamratherthanbyhandfounditpossibletoproduceathousandpagesin
5、anhourratherthanthirty.7.Insomeindustrialregions,heavilyladenwagons,withflangedwheels,werebeinghauledbyhorsesalongmetalrails;andthestationarysteamenginewaspuffinginthefactoryandmine.8.AnothergenerationpassedbeforeInventorssucceededincombiningtheseingredientsbyputtingtheengineonwhee
6、lsandthewheelsontherails,soastoprovideamachinetotaketheplaceofthehorse.9.WhenhegrewolderWilliamSmithtaughthimselfsurveyingfrombooksheboughtwithhissmallsavingsandattheageofeighteenhewasapprenticedtoasurveyorofthelocalparish.10.Thecompaniesbuildingthecanalstotransportcoalneededsurvey
7、orstohelpthemfindthecoaldepositsworthminingaswellastodeterminethebestcoursesforthecanals.11.HelaterworkedonsimilarjobsacrossthelengthandbreadthofEnglandallthewhilestudyingthenewlyrevealedstrataandcollectingallthefossilshecouldfind.12.Butasmoreandmoreaccumulationsofstratawerecatalog
8、edinmoreandmoreplaces,itbe
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