关于火山的英语阅读理解.doc

关于火山的英语阅读理解

Thevolcano(火山)isoneofthemostsurprisingfrighteningforcesofnature．Maybeyouhaveseenpicturesofthese“fireworks”ofnature．Sometimeswhenavolcanoeruptsaverylargewallofmeltedrockmovesdownthesideofamountain．Itlookslikea“riveroffire．”Sometimesvolcanoesexplodethrowingthemeltedrockandasheshighintotheair．Butwheredoesthismeltedrockcomefrom?

Theearthismadeupofmanylayers．Thetoplayerthatweseeiscalledthecrust．Underthecrustaremanylayersofhardrock．Butfarfarbeneaththecrustwhoserockissohotthatitissoft．Insomeplacesitevenmelts．Themeltedrockiscalledmagma．Sometimesthemagmabreaksouttothesurfacethroughcracksinthecrust．Thesecracksarevolcanoes．

Mostpeoplethinkofmountainswhentheythinkofvolcanoes．Butnoteverymountainisavolcano．Avolcanoissimplytheopeningintheearthfromwhichthemagmaescapes．Thehotmagmaorlavaasitiscalledbuildsuponthesurfaceoftheearth．Overthousandsofyearsthispileofcooledlavacangrowtobeveryverybig．ForexamplethehighestmountaininAfricaKilimanjaroisavolcano．Ittowersmorethan16000feetabovethegroundaroundit．

(1)Whenvolcanoerupts________．[]

A．Everypeoplethinkitamountain．

B．Theearthismadeofseverallayers．

C．therearemanyfirecracks．

D．averylargewallofmeltedrockmovesdownthesideofamountain．

(2)Whichwordsinthepassagehavethesamemeaningas“meltedrock”?[]

A．“Volcano”and“explode”．

B．“Crust”and“hardrock”

C．“magma”and“lava”

D．“Volcano”and“magma”

(3)Whichisthecorrectorderofthelayersoftheearth(beginningwiththetoplayer)?[]

A．crust-hardrock-magma-softrock

B．crust-hardrock-softrock-magma

C．magma-softrock-hardrock-crust

D．volcano-cracks-magma-crust

(4)Thebesttitleofthepassageshouldbe．[]

A．TheVolcano

B．KilimanjaroVolcano

C．TheMountains

D．TheMeltedRock