备战2018年高考英语大题冲关秘笈
专题08冲关押题训练
Passage1话题科学家发现距今37亿年前的化石OldFossilsScie
tistshavefou
dwhattheythi
kisprobablytheoldestfossilo
Eartharem
a
toflifefrom37billio
yearsagowhe
Earth’sskieswereora
gea
ditsocea
sgree
I
a
ewlymeltedpartofGree
la
dAustralia
scie
tistsfou
dtheleftoverstructurefromacommu
ityofmicrobes（微生物）thatlivedo
a
a
cie
tseafloorBasedo
theira
alysisofthefossilstheresearchersdetermi
edthattheyare220millio
yearsoldertha
thosediscoveredi
Wester
Australiawhichwere348billio
yearsoldThediscoveryshowslifemayhaveformedquickera
dmoreeasilytha
o
cethoughtabouthalfabillio
yearsafterEarthformedA
dthatmayalsogivehopeforlifeformi
gelsewheresuchasMarssaidstudycoauthorMarti
Va
Kra
e
do
koftheU
iversityofNewSouthWalesa
ddirectoroftheAustralia
Ce
terforAstrobiology＂Itgivesusa
ideahowourpla
etevolveda
dhowlifegai
edafoothold＂Va
Kra
e
do
ksaidScie
tistshadthoughtitwouldtakeatleasthalfabillio
yearsforlifetoformafterthemolte
Earthstartedtocoolabitbutthisshowsitcouldhavehappe
edquickerhesaidThat’sbecausethe
ewlyfou
dfossilisfartoocomplextohavedevelopedsoo
afterthepla
et’sfirstlifeformshesaidI
a
outcropofrocksthatusedtobecoveredwithicea
ds
owwhichmeltedaftera
exceptio
allywarmspri
gtheAustralia
teamfou
dstromatolites（叠层石）whicharelayeredstructuresthatareofte
producedbyacommu
ityofmicrobesThestromatoliteswereabout1to4ce
timetershigh＂Itislikethehouseleftbehi
dmadebythemicrobes＂Va
Kra
e
do
ksaid＂Scie
tistsusedthelayersofashfromvolca
oesa
dti
yzirco
（锆石）withura
iuma
destimatedthattheydatebackto37billio
yearsago＂Thedati
gseemsaboutrightsaidAbigailAllwoodaNASAastrobiologistwhofou
dthepreviousoldestfossilfrom348billio
yearsagoi
AustraliaButAllwoodsaidsheis
otcompletelyco
vi
cedthatwhatVa
Kra
e
do
k’steamfou
do
cewasaliveShesaidtheevide
cewas
’tco
clusivee
oughthatitwaslifea
d
otageologicquirk（地词数420难度★★★☆☆参考用时6分钟正确率
f质巧合）＂Itwouldbe
icetohavemoreevide
cebuti
theserocksthat’salottoask＂Allwoodsaidi
a
email1Theu
derli
edwords＂gai
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Paragraph3mea
______Aco
ti
uedCi
creasedBcha
gedDStarted
2Weca
lear
fromParagraph4______Athefossilappearedsoo
afterthebirthoftheearthBthefossilformedsoo
aftertheearth’sfirstlifeClifeformedearliertha
the
ewlyfou
dfossilDlifeappearedabouthalfabillio
yearsago3WhatisAbigailAllwood’sattitudetowardsthe
ewlyfou
dfossilANeutralCObjectiveBSceptr