2016年6月英语四级考试：仔细阅读练习(1)思维导图
Newspapers often tell us of floods in some parts of the United States. Nearly every year on the great central drainages heavy rains and melting snow cause the waters to pour o
树图思维导图提供 2016年6月英语四级考试：仔细阅读练习(1) 在线思维导图免费制作，点击“编辑”按钮，可对 2016年6月英语四级考试：仔细阅读练习(1) 进行在线思维导图编辑，本思维导图属于思维导图模板主题，文件编号是：27ee6e318985064e6b2fb947fb876c75
思维导图大纲
2016年6月英语四级考试：仔细阅读练习(1)思维导图模板大纲
NewspapersoftentellusoffloodsinsomepartsoftheUnitedStates.
Nearlyeveryyearonthegreatcentraldrainagesheavyrainsandmeltingsnowcausethewaterstopouroutthemountainsandplains,toturnbrooksintotorrents,andtoswellquietstreamsintowilduncontrolledrivers.FromCairotoNewOrleans,andfromPittsburghtoPaducah,thecry"Riverrising!"isafamiliaryetfearfulvoice...Whentheriverssometimesbecometoohighortooswifttobecontrolledcommunitiesareflooded,familiesfleefromtheirhomes,croplandsarewashedout,andtransportationcomestoahalt.Hunger,disease,anddeathfollowthewildwaters.
Althoughgivenlesspublicity,theagriculturaldamagedonebythemanysmaller,morefrequentfloodsusuallyfarexceedsthelossescausedbytheverygrandones.IntheCentralStates,ditchesanddrainscausetheflowsfromspringrainsandmeltingsnowtorunfarmorerapidlythaninthedaysbeforewhitemensettledontheland.Once,excessspringfloodwatersemptiedintolakesandswampylands,theretobedetainedforslowreleaseintostreamandrivers.Now,systematicdrainagehasactuallyeliminatedthesenaturalreservoirs.
InthemorerollingsectionsoftheEast,springrunoffwasformerlyabsorbedandheldtemporarilyintheporoussoilsbeneaththeunbrokenexpanseofforest.Whenlargeareaswereconvertedtofarmuse,removaloftheforestandthepracticeofup-and-downhillplowingdeprivedthesoilsofmuchoftheirabilitytocatchandstorewater.
Theeffectsofeliminatingthenaturalforestcoverareshowninthegulliedfarmlandsandwidenedstreamchannelsfoundinsomedenselysettledareas.Partlybecausethestreamchannelsaremoreorlessfilledwithmaterialwasheddownfromtheuplands,andpartlybecausestormrunoffhasincreased,thechannelsaretodaynolongerabletocarryalltheflowfromheavyrains.Thisexplainswhythestreamsovertopbanksfarmoreoftenthaninthedaysbeforesettlement.
26.Thebesttitlefortheselectionwouldbe______.
A.RiverRising!RiverRising!B.ForestsandFloods
C.FloodingintheU.S.D.TheResultsofFlooding
27.AllofthefollowingcausefloodsEXCEPT______.
A.heavyrainB.meltingsnow
C.increasingstormrunoffD.poroussoil
28.Theauthorstatesthat______.
A.lakesandswampsonceactedlikenaturalreservoirs
B.up-and-downhillplowingcatchesandstoreswater
C.streamchannelsarethebestcarriersofwater
D.floodsareeasilypreventedandcontrolled
29.Accordingtotheselection,streamsovertoptheirbankspartlybecause______.
A.materialfromhigherlandiswashedintothem
B.ditchesanddrainsleadintothem
C.riversbecometooswift
D.snowmeltsmorerapidlynowadays
30.Thefloodswhicharegivenmostpublicity______.
A.causenodamage
B.causethemostdamage
C.causelessagriculturaldamagethanthemanysmaller,morefrequentfloods
D.farexceedthesmaller,morefrequentfloodsinagriculturalloss
答案：26.C27.D28.A29.A30.C
相关思维导图模板
树图思维导图提供 1、初级第一节文案: 在线思维导图免费制作，点击“编辑”按钮，可对 1、初级第一节文案: 进行在线思维导图编辑，本思维导图属于思维导图模板主题，文件编号是：0e341e8072f8485a33565ca966dda782
树图思维导图提供 第二章 信用、利息与利率（1） 在线思维导图免费制作，点击“编辑”按钮，可对 第二章 信用、利息与利率（1） 进行在线思维导图编辑，本思维导图属于思维导图模板主题，文件编号是：7e36583bc55aabbfcb79dc52aec83ad7
沪公网安备 31011502019485号
上海工商