C A volcanic eruption in Iceland has sent ash across northern Europe. Airlines have stoppe

C

AvolcaniceruptioninIcelandhassentashacrossnorthernEurope.AirlineshavestoppedorchangedtheflightsacrosstheAtlanticOcean,leavinghundredsofpassengersstuckinairports.

GrirmsvomisoneofthelargestandmostactivevolcanoesinEurope.WhatmakesGrimsvomdifferentisthatitliesunderahugeglacier（冰川）oficeupto12matersthick.Thehotvolcanoheatsuptheiceaboveit,whichthenformsalayer（层）ofwaterbetweentheglacierandthevolcanoThislayerofwaterputspressureonthevolcano,keepingitstable ,Asthewaterflowsoutfromundertheglacier,thepressurelifts.Thelava（岩浆）fromthevolcanothencomesuptothesurface.Thisisexactlywhathappenedtoday.

Now,airlineshavetomakechangestotheirflightssoasnottoflythroughthecloudsofvolcanicash.AccordingtoKLM.oneofEurope’sbiggestairlines,airplanescannotgounderthecloudoroverit.Goingthroughthecloudcanresultinashgettingstuckintheairplane’sengines,causingdamagetotheplane.

TheeruptionhasalsocausedproblemsforanimalsinIceland.Thevolcanoleftashandsharp.Glass-likerocksalloverthecountr yside.Farmersarekeepingtheiranimalsinsidetostopthemfromeatingash-coveredgrasstothesharpobject.

64.WhatmakesGrimsvomdifferentfromothervolcanoes?

A.Itisbelowice.

B.Itliesunderthesea

C.Itisthelargestvolcano

D.Itislavaaffectstheairlines