新编英美概况 许鲁之(第四版)unit1-12课后习题选择填空

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1、Chapter1GeographicalFeaturesandNaturalResources1.Inarea,theUnitedStatesisthe4thlargestcountryintheworld.2.TheMidwestintheUSreferstotheregionaroundtheGreatLakesandtheupperMississippiValley.3.TheBackboneofNorthAmericareferstotheRockyMountains4.DeathValleyisonthewesternedgeoftheGreatBasin.5.TheGreat

2、Plainsmighthaveaduststorminsummer.6.ThewesternpartofWashingtonStatehasthehighestrainfallintheUS.7.TheUSprimarysuppliersofforeignoilarethefollowingcountriesexceptJapan8.TheUSlargestopen-pitcopper-miningcenterisinUtah.1.TheUnitedStatesisborderedonthenorthbyCanada,onthesouthbyMexicoandtheGuffofMexic

3、o,ontheeastbytheAtlanticOcean,andonthewestbythePacificOcean.2.ThelargeterritoryofthecontinentalUSisdividedintothreebasicareas:A.theAtlanticseacoastwesttotheAppalachiansB.theMississippiRiverBasinC.theRockieswesttothePacific3.TheMiddleAtlanticStatesarethemostdenselypopulatedregionintheUS,wherethela

4、ndisflatandfertile.4.TheCentralValleyofCaliforniaisahighlyproductivearea,whichproducedenormousamountsoffruitsandvegetables.5.MostproductionofoilandnaturalgasintheUScomesfromoffshoreareasofLouisianaandTexas,andfromonshoreareasofTexas,OklahomaandCalifornia.HerbigconsumptionofenergynowhasmadeAmerica

5、insufficientinoilsupply.TheUSrelianceofforeignoilhasremindedconsistentlyinthe40%ranges.6.TheUnitedStateshaslittletroublecausedbytheshortageoffreshwater.FarmlandsintheUSmakingupabout12%ofthearablelandsintheworld,andtheyareamongtherichestandmostproductive.Chapter2AmericanPopulation1.Theover3million

6、ofearlyAmericansin1790weremostlyofBritishancestry.2.About700,000immigrantswerelegallyreceivedbytheUSeachyearduringthe1980s.3.TheofficialracialsegregationcontinuedtobethelawoftheUSuntil1954.4.AmericanIndiansnowmainlyliveintheSouth.5.ThemajorityofAmericanHispanicsarefromthefollowingcountriesexceptS

7、pain.6.TheWestnowleadsinpercentageincreaseinpopulation.7.Accordingtothe1994UScensus,thesecondmostpopulousstateintheUSisTaxes.8.ThetrendinmigrationfromcitiestosuburbsnowprevailedinallregionsexcepttheSouth.1.TheUnitedSta