新编英美概况许鲁之Unit112课后习题选择填空.docx

新编英美概况许鲁之Unit112课后习题选择填空.docx

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Chapter1GeographicalFeaturesandNaturalResources1.Inarea,theUnitedStatesisthe4thlargestcountryintheworld.

TheMidwestintheUSreferstotheregionaroundtheGreatLakesandtheupperMississippiValley.

TheBackboneofNorthAmericareferstotheRockyMountains

DeathValleyisonthewesternedgeoftheGreatBasin.

TheGreatPlainsmighthaveaduststorminsummer.

ThewesternpartofWashingtonStatehasthehighestrainfallintheUS.

TheUSprimarysuppliersofforeignoilarethefollowingcountriesexceptJapan8.TheUSlargestopen-pitcopper-miningcenterisinUtah.

TheUnitedStatesisborderedonthenorthbyCanada,onthesouthbyMexicoandtheGuffofMexico,ontheeastby

theAtlanticOcean,andonthewestbythePacificOcean.

ThelargeterritoryofthecontinentalUSisdividedintothreebasicareas:

theAtlanticseacoastwesttotheAppalachians

theMississippiRiverBasin

theRockieswesttothePacific

TheMiddleAtlanticStatesarethemostdenselypopulatedregionintheUS,wherethelandisflatandfertile.

TheCentralValleyofCaliforniaisahighlyproductivearea,whichproducedenormousamountsoffruitsandvegetables.

MostproductionofoilandnaturalgasintheUScomesfromoffshoreareasofLouisianaandTexas,andfromonshoreareasofTexas,OklahomaandCalifornia.HerbigconsumptionofenergynowhasmadeAmericainsufficientinoilsupply.TheUSrelianceofforeignoilhasremindedconsistentlyinthe40%ranges.

TheUnitedStateshaslittletroublecausedbytheshortageoffreshwater.FarmlandsintheUSmakingupabout12%ofthearablelandsintheworld,andtheyareamongtherichestandmostproductive.

Chapter2AmericanPopulation1.Theover3millionofearlyAmericansin1790weremostlyofBritishancestry.

2.About700,000immigrantswerelegallyreceivedbytheUSeachyearduringthe1980s.3.TheofficialracialsegregationcontinuedtobethelawoftheUSuntil1954.

AmericanIndiansnowmain

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