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职称英语真题《理工C》阅读判断真题职称英语真题《理工C》阅读判断真题精选不少考生开始备考2017年职称英语考试，为了帮助大家更好地备考职称英语考试，以下是yjbys网小编整理的关于职称英语真题《理工C》阅读判断真题精选，供大家备考。ADHDLinkedtoAirPollutantsChildrenhaveanincreasedriskofattentionproblems,seenasearlyasgradeschool,iftheirmornsinhaled(吸入)acertaintypeofairpollutionwhentheywerepregnant.That'sthefindingofanewstudy.Releasedwhenthingsaren'tburnedcompletely,thispollutionisknownaspolycyclicaromatichydrocarbons,orPAHs.ThebiggestsourcesofthesePAHs:theburningoffossilfuels,woodandtrash.FredericaPereraworksatColumbiaUniversity'sMailmanSchoolofPublicHealthinNewYorkCity.Sheresearcheshowexposuretothingsintheenvironmentaffectschildren'shealth.Inanewstudy,sheandherteamstudiedtheexposuretoairpollutionof233nonsmokingpregnantwomeninNewYorkCity.Becauseburningtobaccocanspew(排放)PAHsintotheairandlungs,Perera'steamfocusedonnonsmokers.Theresearcherswantedtoprobe(探查)othersourcesofPAHs,onesthatwouldhavebeenhardforanindividualtoavoid.Theteamstartedbytestingthebloodofeachwomanduringpregnancy.Thereason:AnyPAHsinawoman'sbloodwouldalsobeavailabletothebabyinherwomb.Nineyearslater,theresearchersinvestigatedsignsofattentionproblemsinthesechildren,nowage9.Theyaskedeachchild'smotheraseriesofquestions.Theseincludedwhetherherchildhadproblemsdoingthingsthatneededsustained(长期的)mentaleffort,suchashomeworkorgameswithfriends.Thescientistsalsoaskedifthekidshadtroublefollowinginstructionsormadefrequent,carelessmistakes.AllofthesecanbesymptomsofadisordercalledAttentionDeficitHyperactivityDisorder,orADHD.Aboutonein10U.S.childrenhasADHD.Amongthewomenstudied,trafficandhomeheatingweretheprimarysourcesofairpollutionexposure,Pereraandherteamsuspect.SomeofthesewomenhadlowlevelsofPAHsintheirblood.Othershadhighlevels.Thosewithhighlevelswerefivetimesaslikelytohavechildrenwhoshowedattentionproblemsbyage9.ThenewfindingswerepublishedonNovember5inthejournalPLOSONE.16.PereraandherteamchosenonsmokingpregnantwomenalloverAmerica.A.RightB.WrongC.Notmentioned17.Themainpurposeoftheresearchwastofi
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