当前位置:考试网  > 试卷库  > 外语类  > 大学英语  > 大学英语六级  > 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
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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

更新时间:2024-04-26 17:58:06
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28. Not until Mr. Smith came to China what kind of country she is.

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35. Like other language skills, reading requires practice.

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36. It is only through practice one will be able to swim skillfully.

A. what B. who C. that D. which

37. The brain is capable of ignoring pain message of to concentrate on other activities.

A. it allowed B. is it allowed C. allowed D. allowed it

38. Don’t worry, I have already them the decision.

A. informed; with B. informed; of C. informed; for D. informed; that

39. The child was sorry his mother when he arrived at the station.

A. to miss B. having missed C. missing D. to have missed

40. I wonder why he to discuss the problem at the meeting.

A. declined B. rejected C. refused D. delayed

41. You can hang up what you like on these walls.

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42. According to a , the majority would rather have newspapers without a government than a government without newspapers.

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43. The population of the village has decreased 150 to 500.

A. in B. at C. by D. with

44. It seems that there is that I can’t do.

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45. They are often caring more about animals than human beings.

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46. a good beginning is made, the word is half done.

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47. George could not his foolish mistake.

A. account in B. count on C. count for D. account for

48. We came into this field late, so we must work hard to the lost time.

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49. The new law will came into on the day it is passed.

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50. We can separate the mixture into the pure chemical compounds it is composed.

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51. Mrs. Lincoln has that she is unable to get a job.

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52. She can’t prevent her little boy shooting birds.

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60. They overcame all the difficulties and fulfilled the plan three months ahead of time, is something we had not expected.

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