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.TheGreatPla

2、insmighthaveaduststorminsummer.6.ThewesternpartofWashingtonStatehasthehighestrainfallintheUS.7.TheUSprimarysuppliersofforeignoilarethefollowingcountriesexceptJapan8.TheUSlargestopen-pitcopper-miningcenterisinUtah.1.TheUnitedStatesisborderedonthenorthbyCanada,onthesouthbyMexicoandtheGuffofMexico,onth

3、eeastbytheAtlanticOcean,andonthewestbythePacificOcean.2.ThelargeterritoryofthecontinentalUSisdividedintothreebasicareas:A.theAtlanticseacoastwesttotheAppalachiansB.theMississippiRiverBasinC.theRockieswesttothePacific3.TheMiddleAtlanticStatesarethemostdenselypopulatedregionintheUS,wherethelandisflata

4、ndfertile.4.TheCentralValleyofCaliforniaisahighlyproductivearea,whichproducedenormousamountsoffruitsandvegetables.5.MostproductionofoilandnaturalgasintheUScomesfromoffshoreareasofLouisianaandTexas,andfromonshoreareasofTexas,OklahomaandCalifornia.HerbigconsumptionofenergynowhasmadeAmericainsufficient

5、inoilsupply.TheUSrelianceofforeignoilhasremindedconsistentlyinthe40%ranges.6.TheUnitedStateshaslittletroublecausedbytheshortageoffreshwater.FarmlandsintheUSmakingupabout12%ofthearablelandsintheworld,andtheyareamongtherichestandmostproductive.Chapter2AmericanPopulation1.Theover3millionofearlyAmerican

6、sin1790weremostlyofBritishancestry.2.About700,000immigrantswerelegallyreceivedbytheUSeachyearduringthe1980s.3.TheofficialracialsegregationcontinuedtobethelawoftheUSuntil1954.4.AmericanIndiansnowmainlyliveintheSouth.5.ThemajorityofAmericanHispanicsarefromthefollowingcountriesexceptSpain.6.TheWestnowl

7、eadsinpercentageincreaseinpopulation.7.Accordingtothe1994UScensus,thesecondmostpopulousstateintheUSisTaxes.8.ThetrendinmigrationfromcitiestosuburbsnowprevailedinallregionsexcepttheSouth.1.TheUnitedSta