Atthefirstsightthepla
etMarsdoes
otappearverywelcometoa
yki
doflifeIthasverylittleoxyge
a
dwaterthetemperatureat
ightisbelow50°Ca
dwi
dsof100milesperhourcausesevereduststormsHoweverthesurfaceofthepla
etseemstoshowthatwaterflowedacrossitsometimei
thepasta
ditisbelievedthatthereise
oughiceatthepolestocoverthepla
etwithwaterifitmeltsAlthoughthereis
olifeo
theMars
owsomescie
tiststhi
kthattheremayhavebee
someformoflifelo
gtimeagoAtthattimethepla
ethadactivevolca
oestheatmospherewasthickera
dwarmera
dtherewaswaterI
facti
somewaystheMarsmayhavebee
similartotheEarthwherelifeexistsSomepeoplebelievethattheMarscouldsupportlifei
thefutureiftherightco
ditio
swereproducedThefirststepwouldbetowarmthepla
etusi
gcertai
gaseswhichtraptheSu
sheati
thepla
etsatmosphereWithwarmthwatera
dcarbo
dioxide二氧化碳simplepla
tscouldbegi
togrowThesepla
tscouldslowlymaketheMarsmoresuitableforlivi
gItisestimatedthatthewholeprocessmighttakebetwee
100000a
d200000yearsI
themea
timepeoplecouldbegi
toliveo
thepla
eti
specialclosede
viro
me
tsTheywouldprovidealotofusefuli
formatio
aboutco
ditio
so
theMarsa
dtheproblemsco
ectedwithlivi
gthere1Somescie
tiststhi
ktheremayhavebee
lifeo
theMarsi
thepastbecause_______________Athereis
olifethere
owBthereisalargeamou
tofwateratthepolesCtheMarsmaybeabletosupportlifei
thefutureDco
ditio
smayhavebee
similartothoseo
theEarth2Therecouldbelifeo
theMarsi
thefutureif________________Aitsupportedlifei
thepastBcertai
gasesareusedtocoolthepla
etCtheatmosphereca
beheatede
oughtogrowsimplepla
tsDthepla
etsvolca
oesbecomeasactiveastheywerei
thepast3Peoplemaybeabletoliveo
theMars_________________Awithi
the
ext200000yearsBo
ly200000yearsfrom
owCo
ly150000yearsfrom
owDassoo
asthepla
etbecomescoole
ough4Theauthorsattitudetowardsthepossibilityoflifeo
theMarsi
thefutureis____________AdoubtfulBpositiveC
egativeDu
i
terested5WhichisthebesttitleforthispassageAThePossibilityofLifeo
theMarsBFutureCo
ditio
so
theMarsCTheMarsa
dtheEarthDAStudyoftheClimateoftheMars答案：1D2C3A4B4A
第3页共33页
f天一文化教育集团锐志文化2009专升本串讲复习资料密押版
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