【Wheredoyoukeepice?Inthefreezer,ofcourse.That'swhatscientistsmighthavethoughtwhentheywerelookingforasafeplacetostoreicefrommountainglaciersfromaroundtheworld.They'vedecidedtostoreiceinAntarcticabecauseglob】
Wheredoyoukeepice?Inthefreezer,ofcourse.That'swhatscientistsmighthavethoughtwhentheywerelookingforasafeplacetostoreicefrommountainglaciersfromaroundtheworld.They'vedecidedtostoreiceinAntarcticabecauseglobalwarmingiscausingsomeoftheglaciersinplacesliketheAlpstomelt.
JeromeChappellazoftheFrenchNationalCentreforScientificResearchisinvolvedincreatinganicevault (地下室)there.Hesays:"Weareprobablytheonlyscientificcommunitywhosesample (样本) isindangerofdisappearingfromthefaceoftheplanet.Ifyouworkonrocksorontreerings,therawmaterialisstillhereandwillbeformanycenturies."
AndwhydoscientistsneedtostudyicefromtheAlps?Iceformedonthetopofamountainismadeofsnowaccumulatedoverthousandsofyears.Trappedairbubbles (气泡) containsamplesoftheatmospherethatexistedwhenthaticewasformed.Iceisarecordofclimate.Byexaminingice,weknowcarbondioxideintheatmosphereishighernowthaninthelastthreemillionyears.Researchersusethiskindofdatatobuildcomputermodelsandtrytopredictwhatmighthappeninthefuture.
TheicevaultwillbehousedinasnowcaveattheConcordiaResearchStation,whichisoperatedbyscientistsfromFranceandItaly.Theicesampleswillbesealedinbagsandplaced10metersbelowthesurfaceataconstanttemperatureof-50*C.Thiswillputthescientists'mindsatrest.Losingtheicesampleswouldbeadisaster,andnobodywantstoseeamineofscientificknowledgelostforeverinagiantpool.
28.Whatistheresearchers'purposeofstudyingice?___
A.Tolearnaboutclimate.
B.TolearnabouttheAlps.
C.Totrapairbubbles.
D.Toreducecarbondioxide.
29.Jeromecomparesicewithrocksandtreeringstostatethat___.
A.iceshouldbestoredathome
B.it'smorevaluabletostudyice
C.icedisappearsveryquickly
D.it'snecessarytostoreice
30.WhatmakesAntarcticaasafeplacetostoreice?___
A.Itslargemountains.
B.Itsfunctionasafreezer.
C.Theabundanticesamplesthere.
D.Theabsenceofglobalwarming.
31.WhatdoscientiststhinkofstoringiceinAnta