【导读】本文为说明文。 主要介绍了研究人员发现格陵兰地下的水系统受到冰盖变化的影响。

C

For more than a decade， ateamofresearchershavestudiedthedynamicsofthegreenlandicesheetasitrespondstoawarmingclimate.butwhilemuchoftheirfocushasben hange，theirmostrecentresearchfindingshaveoverturnedtheorderoftheirthinking.meierbachtol， harperandtheirteamdiscoveredthatchangesintheicesheethavearealimpactonthemassivegroundwatersystemunderlyingreeenland。

thislatestdiscoveryoccurredthankstoamarriageofdrillingtechniques.internationalcooperatorsmadeanangledhole 650 metersthroughbedbedbed acier (冰川) tomeasuregroundwaterconditionsundertheice.meanwhile，researchers drilled 32 holesfromatoptheglled through nearlly a keary a tomeasurewaterconditionsattheareabetweeniceandbedrock，whichformsanimportantboundarycontrollinggroundwaterflowbelow.after drer theteamfixedsensorsintheicecolumnandattheicesheetbedtomeasureicedynamicsandwaterconditionsaswaterflowsundertheice。

" bystudyingareascoveredbyice 10，000 years ago，wehaveknownthatthehugemassandvastamountsofwaterfrommeltingicecanimpactttheheunderestthesthechanimpanimpattthed." ”meierbachtolsaid .“it’sgenerallyacceptedthatthegroundwaterissleepingoverdecadestocenturiesanditsresponsetoiceshetchange

thisnewunderstandingcouldhaveimportantsubsequenteffectsonhowgreenland’sthinningimpactsthearctic.thethinningicecouldredreducettic reduce the f ground water flow to the ocean， changingthewatertemperatureandsalinity (盐分) balancethatisimportantforoceancirculation (盐分)循环patterns .“inthinkingaboutttthecompompompratintecompatid ingchange，wehavereallyignoredthegroundwatercomponent，"

8.howdotheresearchersfeelabouttheresultoftherecentstudy

a .固定。

B. Disappointed

C. Surprised

D. Doubtful。

9.whatcontributesmosttothenewresearchaboutthegreenlandicesheet

A. Fixing sensors into ice sheet。

b .合作伙伴关系。

c .高级驱动技术。

d.acombinationoftwodrillingapproaches。

10.whatisamisunderstandingofthegroundwaterunderglaciers

A. It has a very large volume .

B. It is inactive for a long time。

C. Its component is complex。

D. Its temperature is changeable。

11.whichofthefollowingisasuitabletitleforthetext

a.waterimpactsthegreenland’sice sheet

b.longlastingeffectsofglobalwarmingonthearctic

c.newlydiscoveredgroundwaterresourcesingreenland

d.Greenland’sgroundwaterchangeswiththinningicesheet8. C9.D10.b11.d