2024年4月16日发(作者：)

新概念英语第四册课文

Lesson1

Wecanreadofthingsthathappened5,000yearsagointheNearEast,wherepeople

rearesomepartsoftheworldwhereevennowpeople

ywaythattheycanpreservetheirhistoryistorecountitas

sa

legendsareusefulbecausetheycantellussomethingaboutmigrationsofpeoplewho

livedlongago,pologistswondered

wheretheremoteancestorsofthePolynesianpeoplesnowlivinginthePacificIslands

asofthesepeopleexplainthatsomeofthemcamefromIndonesia

about2,000yearsago.

Butthefirstpeoplewhowerelikeourselveslivedsolongagothateventheirsagas,if

theyhadany,aeologistshaveneitherhistorynorlegendstohelp

themtofindoutwherethefirst'modernmen'camefrom.

Fortunately,however,ancientmenmadetoolsofstone,especiallyflint,becausethisis

yalsohaveusedwoodandskins,butthese

oesnotdecay,andsothetoolsoflongagohaveremained

wheneventhebonesofthemenwhomadethemhavedisappearedwithouttrace.

Lesson2

Why,youmaywonder,shouldspidersbeourfriends?Becausetheydestroysomany

insects,s

wouldmakeitimpossibleforustoliveintheworld;theywoulddevourallourcropsand

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新概念英语第四册课文

killourflocksandherds,ifitwerenotfortheprotectionwegetfrominsect-eating

lottothebirdsandbeastswhoeatinsectsbutallofthemput

er,unlikesome

oftheotherinsecteaters,spidersneverdotheleastharmtousorourbelongings.

Spidersarenotinsects,asmanypeoplethink,

tellthedifferencealmostataglanceforaspideralwayshaseightlegsandaninsect

nevermorethansix.

Howmanyspidersareengagedinthisworkonourbehalf?Oneauthorityonspiders

madeacensusofthespidersinagrassfieldinthesouthofEngland,andheestimated

thatthereweremorethan2,250,000inoneacre,thatissomethinglike6,000,000spiders

sarebusyforatleasthalftheyearinkilling

possibletomakemorethanthewildestguessathowmanytheykill,but

theyarehungrycreatures,een

estimatedthattheweightofalltheinsectsdestroyedbyspidersinBritaininoneyear

wouldbegreaterthanthetotalweightofallthehumanbeingsinthecountry.

Lesson3

Modernalpiniststrytoclimbmountainsbyaroutewhichwillgivethemgoodsport,and

themoredifficultitis,ioneeringdays,however,

lyclimberswerelookingfortheeasiestwaytothetop

becausethesummitwastheprizetheysought,especiallyifithadneverbeenattained

uethatduringtheirexplorationstheyoftenfaceddifficultiesanddangers

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