acethatte
dtoappeara
dgrowduri
gthewarmestMartia
mo
thsa
dfadetherestoftheyearMarsisextremelycoldeve
i
summera
dthestreaksarei
placeswherethetemperatureisaslowasmi
us10degreesFahre
heitButsaltca
lowerthefreezi
gpoi
tofwatera
dmelticeThesource源头ofthewaterisamysteryScie
tists
oteditcouldbemelti
giceItcouldbea
u
dergrou
daquiferwhichisrockorsa
dthatca
holdwaterItispossiblywatervaporfromthethi
Martia
atmosphereoritmaybeacombi
atio
MichaelMeyerleadscie
tistforNASAsMarsexploratio
programsaidtheo
lydefi
itivewayfor
owtodetermi
ewhetherthereslifeo
Marsistocollectrocksa
dsoilfora
alysiso
Earthsomethi
gaUSla
dersetforliftoffi
2020willdo12Whatmatterstotheexiste
ceofliquidwatero
MarsAThedista
cefromthesu
BThefavorableclimateCThegravityoftheearthD．Thesalti
it．13Accordi
gtoJoh
Gru
sfeldo
MarsthereseemstobeAsaltywaterBsta
di
gwaterCrocketfuelDhuma
bei
gs14Whatarescie
tistsu
certai
aboutthewatero
MarsAItsstateBItssourceCItstemperatureDItstaste15WhatwouldbethebesttitleforthetextAStreamsofWaterSpottedo
MarsBAstro
autswillLa
do
MarsCNASAsMarsExploratio
ProgramDABreakthroughi
theExploratio
ofMars【答案】12D13A14B15A【解析】12．D细节理解题。根据文章的第一句，可知D选项与之相符。
第11页共5页

f13．A细节理解题。同样是根据第一段中的Marsappearstobeflowi
gwithsmallstreamsofsaltywater，，可知saltywater是可能存在于火星上。14．B细节理解题。根据文章最后一段的第一句Thesourceofthewaterisamystery，主可知B选项的意思与之相符。15．A标题判断题。第一段的第一句Marsappearstobeflowi
gwithsmallstreamsofsaltywater，以及文章的其它部分的内容，可知文章主要是围绕着火星是否有水这一个主题来展开的。
第二节根据短文内容，从短文后的选项中选出能填入空白处的最佳选项。选项中有两项为多余选项。
AHowtoSucceedi
Scie
ceTosucceedi
scie
ceyou
eedalotmoretha
luckI
myviewyouhavetocombi
ei
tellige
cewithawilli
g
ess
ottofollowco
ve
tio
swhe
theyblockyourpathforwardThusthesehavecometobemyrulesforsuccess116Thatmightsou
dproudbutthefactisthatyoumustalwaystur
topeoplewhoarebrightertha
yourselfIt’slikeplayi
ga
ygameEve
asachildI
everwa
tedtoplaygameswitha
yo
ewhowasasbadasIwasIfyouwi
itgivesyou
opleasureA
di
thegameofscie
ceorlifethehighestgoalis
’tsimplytowi
it’stowi
atsomethi
greallydifficult172TakerisksTomakeahugesuccessascie
tisthastobepreparedtogeti
todeeptroubleIfyour