考研英语出色作文

考研英语出色作文

导读：我根据大家的需要整理了一份关于《考研英语出色作文》的内容，

具体内容：在大学毕业的道路上，对于考研和就业的问题，每个人的选择

都不一样。下面是我给大家整理的，供大家参阅！：Raisingoystersinthe

oysterswere...

在大学毕业的道路上，对于考研和就业的问题，每个人的选择都不一样。

下面是我给大家整理的，供大家参阅！

：Raisingoysters

intheoysterswereraisedinmuchthesamewayasdirtfarmers

raisedtomatoes-bytransplantingthem,first,farmersselectedthe

oysterbed,clearedthebottomofoldshellsandotherdebris,then

scatteredcleanshellsabout,next,they"planted“fertilized

oystereggs,whichwithintwoorthreeweekshatchedintolarvae,

thelarvaedrifteduntiltheyattachedthemselvestotheclean

shellsonthebottom,theretheyremainedandintimegrewintobaby

oysterscalledseedorspat,thespatgrewlargerbydrawingin

seawaterfromwhichtheyderivedmicroscopicparticlesoffood,

beforelong,farmersgatheredthebabyoysters,transplantedthem

oncemoreintoanotherbodyofwatertofattenthemup.

untilrecentlythesupplyofwildoystersandthosecrudelyfarmed

weremorethanenoughtosatisfypeoplesneeds,buttodaythe

delectableseafoodisnolongeravailableinabundance,theproblem

hasbecomesoseriousthatsomeoysterbedshavevanishedentirely.

fortunately,asfarbackastheearly1900smarinebiologists

realizedthatifnewmeasureswerenottaken,oysterswouldbecome

extinctoratbestaluxuryfood,sotheysetupwell-equipped

hatcheriesandwenttowork,buttheydidnothavetheproper

equipmentortheskilltohandletheeggs,theydidnotknowwhen,

what,andhowtofeedthelarvae,andtheyknewlittleaboutthe

predatorsthatattackandeatbabyoystersbythemillions,they

failed,buttheydoggedlykeptatit.finally,inthe1940sa

significantbreakthroughwasmade.

：Oilrefining

animportantnewindustry,oilrefining,grewafterthecivilwar.

crudeoil,orpetroleum-adark,thickoozefromtheearth-had

beenknownforhundredsofyears,butlittleusehadeverbeenmade

ofit.inthe1850ssamuelm.kier,amanufacturerinwestern

Pennsylvania,begancollectingtheoilfromlocalseepagesand

refiningitintokerosene,refining,likesmelting,isaprocess

ofremovingimpuritiesfromarawmaterial.

kerosenewasusedtolightlamps,itwasacheapsubstitutefor

whaleoil,whichwasbecominghardertoget.soontherewasalarge

demandforkerosene,peoplebegantosearchfornewsuppliesof

petroleum.

thefirstoilwellwasdrilledbye.1.drake,aretiredrailroad

conductor,in1859hebegandrillingintitusville,Pennsylvania,

thewholeventureseemedsoimpracticalandfoolishthatonlookers

calleditz，drakesfolly”,butwhenhehaddrilleddownabout70feet

(21meters),drakestruckoil.hiswellbegantoyield20barrels

ofcrudeoiladay.

newsofdrakessuccessbroughtoilprospectorstothescene,by

theearly1860sthesewildcattersweredrillingfor“blackgold”

alloverwesternPennsylvania,theboomrivaledtheCaliforniagold

rushof1848initsexcitementandwildwestatmosphere,andit

broughtfarmorewealthtotheprospectorsthananygoldrush.

crudeoilcouldberefinedintomanyproducts,forsomeyears

kerosenecontinuedtobetheprincipalone.itwassoldingrocery,

storesanddoor-to-door,inthe1880srefinerslearnedhowtomake

otherpetroleumproductssuchaswaxesandlubricatingoils,

petroleumwasnotthenusedtomakegasolineorheatingoil.

：PlateTectonicss,itdescribedthecreationanddestructionof

theoceanfloor,butitdidnotspecifyrigidlithosphericplates.

Thehypothesiswassubstantiatedsoonafterwardbythediscovery

thatperiodicreversalsoftheEarthsmagneticfieldarerecorded

intheoceaniccrust.Asmagmarisesunderthemid-oceanridge,

ferromagneticmineralsinthemagmabecomemagnetizedinthe

directionofthemagmabecomemagnetizedinthedirectionofthe

geomagneticfield.Whenthemagmacoolsandsolidifies,the

directionandthepolarityofthefieldarepreservedinthe

magnetizedvolcanicrock.Reversalsofthefieldgiverisetoa

seriesofmagneticstripesrunningparalleltotheaxisoftherift.

Theoceaniccrustthusservesasamagnetictaperecordingofthe

historyofthegeomagneticfieldthatcanbedatedindependently;

thewidthofthestripesindicatestherateofthesea-floor

spreading.

：icebergs

icebergsareamongnaturesmostspectacularcreations,andyet

mostpeoplehaveneverseenone.avagueairofmysteryenvelops

them,theycomeintobeingsomewhereinfaraway,frigid

waters,amidthunderousnoiseandsplashingturbulence,whichin

mostcasesnoonehearsorsees,theyexistonlyashorttimeand

thenslowlywasteawayjustasunnoticed.

objectsofsheerestbeautytheyhavebeencalled,appearingin

anendlessvarietyofshapes,theymaybedazzlinglywhite,orthey

maybeglassyblue,greenorpurple,tintedfaintlyofindarker

hues,theyaregraceful,stately,inspiringincalm,sunlight

seas.

buttheyarealsocalledfrighteninganddangerous,andthatthey

areinthenight,inthefog,andinstorms,eveninclear

weatheroneiswisetostayasafedistanceawayfromthem.most

oftheirbulkishiddenbelowthewater,sotheirunderwaterparts

mayextendoutfarbeyondthevisibletop.also,theymayrollover

unexpectedly,churningthewatersaroundthem.

icebergsarepartsofglaciersthatbreakoff,driftintothewater,

floataboutawhile,andfinallymelt,icebergsafloattodayaremade

ofsnowflakesthathavefallenoverlongagesoftime,theyembody

snowsthatdrifteddownhundreds,ormanythousands,orinsomecases

maybeamillionyearsago.thesnowsfellinpolarregionsandon

coldmountains,wheretheymeltedonlyalittleornotatall,and

socollectedtogreatdepthsovertheyearsandcenturies.

：Topaz

Topazisahard,transparentmineral.Itisacompoundofaluminum,

silica,andfluorine.Gemtopazisvaluable.Jewelerscallthis

varietyofthestone"precioustopaz”.Thebest-knownprecioustopaz

gemsrangeincolorfromrichyellowtolightbrownorpinkishred.

Topazisoneofthehardestgemminerals.Inthemineraltableof

hardness,ithasaratingof8,whichmeansthataknifecannotcut

it,andthattopazwillscratchquartz.

Thegoldenvarietyofprecioustopazisquiteuncommon