新题型大纲样题（考研英语一）一、七（六）选五Directions:Inthefollowingtext,somesentenceshavebeenremoved.ForQuestions41-45,choosethemostsuitableonefromthelistA-Gtofitintoeachofthenumberedblanks.Therearetwoextrachoices,whichdonotfitinanyoftheblanks.MarkyouranswersonANSWERSHEET1.(10points)LongbeforeManlivedontheEarth,therewerefishes,reptiles,birds,insects,andsomemammals.Althoughsomeoftheseanimalswereancestorsofkindslivingtoday,othersarenowextinct,thatis,theyhavenodescendantsalivenow.41)________Veryoccasionallytherocksshowimpressionofskin,sothat,apartfromcolor,wecanbuildupareasonablyaccuratepictureofananimalthatdiedmillionsofyearsago.Thekindofrockinwhichtheremainsarefoundtellsusmuchaboutthenatureoftheoriginalland,oftenoftheplantsthatgrewonit,andevenofitsclimate.42)________.Nearlyallofthefossilsthatweknowwerepreservedinrocksformedbywateraction,andmostoftheseareofanimalsthatlivedinornearwater.Thusitfollowsthattheremustbemanykindsofmammals,birds,andinsectsofwhichweknownothing.43)________Therewerealsocrab-likecreatures,whosebodieswerecoveredwithahornysubstance.Thebodysegmentseachhadtwopairsoflegs,onepairforwalkingonthesandybottom,theotherforswimming.Theheadwasakindofshieldwithapairofcompoundeyes,oftenwiththousandsoflenses.Theywereusuallyaninchortwolongbutsomewere2feet.44)________.Ofthese,theammonitesareveryinterestingandimportant.Theyhaveashellcomposedofmanychambers,eachrepresentingatemporaryhomeoftheanimal.Astheyounggrewlargeritgrewanewchamberandsealedoffthepreviousone.ThousandsofthesecanbeseenintherocksontheDorsetCoast.45)________.About75millionyearsagotheAgeofReptileswasoverandmostofthegroupsdiedout.Themammalsquicklydeveloped,andwecantracetheevolutionofmanyfamiliaranimalssuchastheelephantandhorse.Manyofthelatermammals,thoughnowextinct,wereknowntoprimitivemanandwerefeaturedbyhimincavepaintingsandonbonecarvings.[A]Theshellfishhavealonghistoryintherockandmanydifferentkindsareknown.[B]Nevertheless,weknowagreatdealaboutmanyofthembecausetheirbonesandshellshavebeenpreservedintherocksasfossils.Fromthemwecantelltheirsizeandshape,howtheywalked,thekindoffoodtheyate.[C]Thefirstanimalswithtruebackboneswerethefishes,firstknownintherocksof375millionyearsago.About300millionyearsagotheamphibians,theanimalsabletolivebothonlandandinwater,appeared.Theyweregiant,sometimes8feetlong,andmanyofthemlivedintheswampypoolsinwhichourcoalseam,orlayer,formed.Theamphibiansgaverisetothereptilesandfornearly150millionyearstheseweretheprincipalformsoflifeonland,inthesea,andintheair.[D]Thebestindexfossilstendtobemarinecreatures.Theseanimalsevolvedrapidlyandspreadoverlargeareasoftheworld.[E]Theearliestanimalswhoseremainshavebeenfoundwereallverysimplekindsandlivedinthesea.Laterformsaremorecomplex,andamongthesearethesea-lilies,relationsofthestar-fishes,whichhadlongarmsandwereattachedbyalongstalktotheseabed,ortorocks.[F]Whenananimaldies,thebody,itsbones,orshell,mayoftenbecarriedawaybystreamsintolakesortheseaaridtheregetcoveredupbymud.Iftheanimallivedintheseaitsbodywouldprobablysinkandbecoveredwithmud.Moreandmoremudwouldfalluponituntilthebonesorshellbecomeembeddedandpreserved.[G]Manyfactorscaninfluencehowfossilsarepreservedinrocks.Remainsofanorganismmaybereplacedbyminerals,dissolvedbyanacidicsolutiontoleaveonlytheirimpression,orsimplyreducedtoamorestableform.二、排序题Directions:Thefollowingparagraphsaregiveninawrongo...
