Indeed,itisarguablethatbodyshatteringistheverypointoffootball,askillingandmaiming___.
Recentresearchhasclaimedthatanexcessofpositiveionsintheaircanhaveanilleffectonpeople’sphysicalorpsychologicalhealth.Whatarepositiveions?Well,theairisfullofions,electricallychargedparticles,andgenerallythereisaroughbalancebetweenthepositiveandthenegativecharged.Butsometimesthisbalancebecomesdisturbedandalargerproportionofpositiveionsarefound.Thishappensnaturallybeforethunderstorm,earthquakeswhenwindssuchastheMistral,HamsinorSharavareblowingincertaincountries.Oritcanbecausedbyabuild-upofstaticelectricityindoorsfromcarpetsorclothingmadeofman-madefibres,orfromTVsets,duplicatorsorcomputerdisplayscreens.
Whenalargenumberofpositiveionsarepresentintheairmanypeopleexperienceunpleasanteffectssuchasheadaches,fatigue,irritability,andsomesensitivepeoplesuffernauseaorevenmentaldisturbance.Animalsarealsoaffected,particularlybeforeearthquakes,snakeshavebeenobservedtocomeoutofhibernation,ratstofleefromtheirburrows,dogshowlandcatsjumpaboutunaccountably.ThishasledtheUSGeographicalSurveytofundanetworkofvolunteerstowatchanimalsinanefforttoforeseesuchdisastersbeforetheyhitvulnerableareassuchasCalifornia.
Conversely,whenlargenumbersofnegativeionsarepresent,thenpeoplehaveafeelingofwell-being.Naturalconditionsthatproducetheselargeamountsarenearthesea,closetowaterfallsorfountains,orinanyplacewherewaterissprayed,orformsaspray.Thisprobablyaccountsforthebeneficialeffectofaholidaybythesea,orinthemountainswithtumblingstreamsorwaterfalls.
Toincreasethesupplyofnegativeionsindoors,somescientistsrecommendtheuseofionisers:smallportablemachines,whichgeneratenegativeions.Theyclaimthationisersnotonlycleanandrefreshtheairbutalsoimprovethehealthofpeoplesensitivetoexcesspositiveions.Ofcourse,therearethedetractors,otherscientists,whodismisssuchclaimsandareskepticalaboutnegative/positiveionresearch.Thereforepeoplecanonlymakeuptheirownmindsbyobservingtheeffectsonthemselves,oronothers,ofanegativerichorpoorenvironment.Afterallitisdebatablewhetherdependingonseismicreadingstoanticipateearthquakesismoreeffectivethanwatchingthecat.
1.Whateffectdoesexceedingpositiveionizationhaveonsomepeople?
A.Theythinktheyareinsane.
B.Theyfeelratherbad-temperedandshort-fussed.
C.Theybecomeviolentlysick.
D.Theyaretootiredtodoanything.
2.Inaccordancewiththepassage,staticelectricitycanbecausedby___.
A.usinghome-madeelectricalgoods.
B.wearingclothesmadeofnaturalmaterials.
C.walkingonartificialfloorcoverings.
D.copyingTVprogramsonacomputer.
3.Ahighnegativeioncountislikelytobefound___.
A.nearapoundwithawaterpump.
B.closetoaslow-flowingriver.
C.highinsomebarrenmountains.
D.byarotatingwatersprinkler.
4.Whatkindofmachinecangeneratenegativeionsindoors?
A.Ionisers.
B.Air-conditioners.
C.Exhaust-fans
D.Vacuumpumps.
5.Somescientistsbelievethat___.
A.watchinganimalstoanticipateearthquakesismoreeffectivethandependingonseismography.
B.theunusualbehaviorofanimalscannotbetrusted.
C.neitherwatchingnorusingseismographsisreliable.
D.earthquake
翻译：
Cultureshockiscausedbytheanxietythatresultsfromlosingallfamiliarsignsandsymbolsofsocialintercourse.(PassageFour)
PARTVREADINGCOMPREHENSION
PASSAGEONE
(1)TheearliestsettlerscametotheNorthAmericancontinenttoestablishcoloniesthatwerefreefromthecontrolsthatexistedinEuropeansocieties.Theywantedtoescapethecontrolsplacedontheirlivesbykingsandgovernments,priestsandchurches,noblemenandaristocrats.ThehistoricdecisionsmadebythosefirstsettlershavehadaprofoundeffectontheshapingoftheAmerican
character.Bylimitingthepowerofthegovernmentandthechurchesandeliminatingaformalaristocracy,theycreatedaclimateoffreedomwheretheemphasiswasontheindividual.IndividualfreedomisprobablythemostbasicofalltheAmericanvalues.Byfreedom,Americansmeanthedesireandtheabilityofallindividualstocontroltheirowndestinywithoutoutsideinterferencefromthegovernment,arulingnobleclass,thechurch,oranyotherorganizedauthority.
(2)Thereis,however,apricetobepaidforthisindividualfreedom:self-reliance.ItmeansthatAmericansbelievetheyshouldstandontheirownfeet,achievingbothfinancialandemotionalindependencefromtheirparentsasearlyaspossible,usuallybyage18or21.
(3)AsecondimportantreasonwhyimmigrantshavetraditionallybeendrawntotheUnitedStatesisthebeliefthateveryonehasaequalchancetoenteraraceandsucceedinthegame.BecausetitlesofnobilitywereforbiddenintheConstitution,noformalclasssystemdevelopedintheU.S.
(4)Thereis,however,apricetobepaidforthisequalityofopportunity:competition.Ifmuchoflifeisseenasrace,thenapersonmustruntheraceinordertosucceed;apersonmustcompetewithothers.ThepressuresofcompetitioninthelifeofanAmericanbegininchildhoodandcontinueuntilretirementfromwork.Infact,anygroupofpeoplewhodoesnotcompetesuccessfullydoesnotfit
intothemainstreamofAmericanlifeaswellasthosewhodo.
(5)AthirdreasonwhyimmigrantshavetraditionallycometotheUnitedStatesistohaveabetterlife.Becauseofitsabundantnaturalresources,theUnitedStatesappearedtobea“landofplentywheremillionscouldcometoseektheirfortunes.Thephrase“goingfromragstoriches”becameasloganfortheAmericandream.Manypeopledidachievematerialsuccess.MaterialwealthbecameavaluetotheAmericanpeople,anditalsobecameanacceptedmeasureofsocialstatus.
(6)Americanspayaprice,however,fortheirmaterialwealth:hardwork.HardworkhasbeenbothnecessaryandrewardingformostAmericansthroughouttheirhistory.Insomeways,materialpossessionsareseenasevidenceofpeople’sabilities.BarryGoldwater,acandidateforthepresidencyin1964,saidthatmostpoorpeoplearepoorbecausetheydeservetobe.MostAmericanswouldfind
thisaharshstatement,butmanymightthinktherewassometruthinit.
(7)ThesebasicvaluesdonottellthewholestoryoftheAmericancharacter.Rather,theyshouldbethoughtofasthemes,aswecontinuetoexploremorefacetsoftheAmericancharacterandhowitaffectslifeintheUnitedStates.
1.Para.4seemstosuggestthat__________.
A.Americansarebornwithasenseofcompetition
B.thepressureofcompetitionbeginswhenonestartswork
C.successfulcompetitionisessentialinAmericansociety
D.competitionresultsinequalityofopportunities
2.WhichofthefollowingmethodsdoestheauthormainlyuseinexplainingAmericanvalues?
A.Comparison
D.Causeandeffect
C.Definition
D.Processanalysis