高难度的银行英语笔试题高难度的银行英语笔试题求职者想进入银行，还是先看看人家英语笔试的难度，心里好有个谱Recentresearchhasclaimedthatanexcessofpositiveionsintheaircanhaveanilleffectonpeople'sphysicalorpsychologicalhealth.Whatarepositiveions？Well，theairisfullofions，electricallychargedparticles，andgenerallythereisaroughbalancebetweenthepositiveandthenegativecharged.Butsometimesthisbalancebecomesdisturbedandalargerproportionofpositiveionsarefound.Thishappensnaturallybeforethunderstorm，earthquakeswhenwindssuchastheMistral，HamsinorSharavareblowingincertaincountries.Oritcanbecausedbyabuild-upofstaticelectricityindoorsfromcarpetsorclothingmadeofman-madefibres，orfromTVsets，duplicatorsorcomputerdisplayscreens.Whenalargenumberofpositiveionsarepresentintheairmanypeopleexperienceunpleasanteffectssuchasheadaches，fatigue，irritability，andsomeparticularlysensitivepeoplesuffernauseaorevenmentaldisturbance.Animalsarealsoaffected，particularlybeforeearthquakes，snakeshavebeenobservedtocomeoutofhibernation，ratstofleefromtheirburrows，dogshowlandcatsjumpaboutunaccountably.ThishasledtheUSGeographicalSurveytofundanetworkofvolunteerstowatchanimalsinanefforttoforeseesuchdisastersbeforetheyhitvulnerableareassuchasCalifornia.Conversely，whenlargenumbersofnegativeionsarepresent，thenpeoplehaveafeelingofwell-being.Naturalconditionsthatproducetheselargeamountsarenearthesea，closetowaterfallsorfountains，orinanyplacewherewaterissprayed，orformsaspray.Thisprobablyaccountsforthebeneficialeffectofaholidaybythesea，orinthemountainswithtumblingstreamsorwaterfalls..comToincreasethesupplyofnegativeionsindoors，somescientistsrecommendtheuseofionisers：smallportablemachines，whichgeneratenegativeions.Theyclaimthationisersnotonlycleanandrefreshtheairbutalsoimprovethehealthofpeoplesensitivetoexcesspositiveions.Ofcourse，therearethedetractors，otherscientists，whodismisssuchclaimsandareskepticalaboutnegative/positiveionresearch.Thereforepeoplecanonlymakeuptheirownmindsbyobservingtheeffectsonthemselves，oronothers，ofanegativerichorpoorenvironment.Afterallitisdebatablewhether