共用题干
ADHD Linked to AIF Pollutants
Children have an increased of attention problems,seen asearly as grade school,if their no-ses inhaled（吸入）a certain type of air pollution when they were pre, ant.That,5 the finding ofa new study.Released when things aren't burned completely,this pollution 15 known as polycyclic aromatic hydrocarbons,or PAHs.Tlle higgest sources of these PAHs:the bunling of fossil fuels, wood and trash.
Frederica Perera works at Columbia University,5 Mailman School of Public Health in New York City.She researclies how exposure to things in the environment affects children,5 health.In a new study,she and her team studied the exposure to air pollution of 233 nonsmokingpre,ant women in New York City.Because burning tobacco can spew（排放）PAHs into the air and lungs, Perera,5 team focused on nonsmokers.The researchers wanted to probe（探查）other sources of PA Hs,ones that,5 would have been hard for an individual to avoid.
The team started by testing the blood of each woman during pregnancy.The reason:Any PA H 5 in a woman's blood would also be available to the baby in her womb．Nine years later,the researchers investigated signs of attention problems in those children,now age 9 .They asked each child’s mother a series of questions.These included whatever her child had prohlems doing things that needed sustained（长期的）mental effort,such as homework or games with friends.The sci-entists also asked if the kids had trouble following instructions or made frequent,careless mis-takes.All of these can be symptoms of a disorder called Attention Deficit Hyperactivity Disorder, or ADHD.About one in U.5.children has ADHD.
Among the women studied,traffic and home heating were the primary sources of air pollution exposure,Pereraand her team suspect.Some of these women had low levels of PAHs in their blood.others had high levels.Those with high levels were five times as likely to have children who showed attention problems by age 9 .The new findings were published November 5 in the journal PLOS ONE.
The women with high levels of PAHs in their blood were more likely to have kids with ADHD.
A: Right
B: Wrong
C: Not mentioned

有疑问？点此联系我们 收藏该题
查看答案

相关问题推荐

  • 共用题干
    The Need to Remember
    Some people say they have no memory at all:"I just can't remember a thing!"But of course we all have a memory.Our memory tells us who we are.Our memory helps us to make use in the present of what we have learnt in the past.
    In fact we have different types of memory.For example,our visual memory helps us recall facts and places.Some people have such a strong visual memory that they can remember exactly what they have seen,for example,pages of a book,as a complete picture.
    Our verbal（言语的）memory helps us remember words and figures we may have heard but not seen or written:Items of a shopping list,a chemical formula,dates,or a recipe.
    With our emotional（情感的）memory, we recall situations or places where we had; strong feelings,perhaps of happiness or unhappiness. We also have special memories for smell,taste, touch and sound,and for performing physical movements.
    We have two ways of storing any of these memories. Our short-term memory stores items for up to thirty seconds-enough to remember a telephone number while we dial.Our long-term mem-ory,on the other hand,may store items for a lifetime. Older people in fact have a much biter long-term memory than short-term .They may forget what they have done only a few hours ago,but have the clearest remembrance（记忆）of when they were very young.
    Psychologists tell us that we only remember a few facts about our past,and that we invent the rest. It is as though we remember only the outline of a story.We then make up the details. We of-ten do this in the way we want to remember them,usually so that we appear as the heroes of our own past , or maybe victims needing sympathy（同情）.
    Verbal memory helps us read words we have never heard.
    A: Right
    B: Wrong
    C:Not mentioned
    查看答案
  • 共用题干
    Look After Your Voice
    Often speakers at a meeting experience dry mouths and ask for a glass of water. You can solve the problem by activating the saliva in your mouth.First gently bite the edges of your tongue with your teeth .Or,press your entire tongue to the bottom of your mouth and hold it there until the saliva flows.Or you can imagine that you are slicing a big juicy lemon and sucking the juice.
    Before you begin your talk,be kind'to your voice.Avoid milk or creamy drinks which dry your throat. Keep your throat wet by drinking a little sweetened warm tea or diluted fruit juice.
    If you sense that you are losing your voice,stop talking completely.In the meantime,do not even talk in a low voice.Save your voice for your health.You may feel foolish using paper to write notes,but the best thing you can do is to rest your voice.If it is necessary,perhaps you can get some advice from a professional singer.
    What about drinking alcohol to wet your throat?I advice you not to touch alcohol before speaking. The problem with alcohol is that one drink gives you a little confidence.The second drink gives you even more confidence.Finally you will feel all-powerful and you will feel you can do everything,but in fact your brain and your mouth do not work together properly.Save the alco- hol until after you finish speaking.
    Perhaps you want to accept the advice,but you may wonder if you can ever change the habits of a lifetime .Of course you can .Goethe,who lived before indoor skating rinks or swimming pools,said,“We learn to skate in the summer and swim in the winter”.Take this message to heart and give yourself time to develop your new habits.If you are willing to change,you will soon be able to say that you will never forget these techniques because they became a part of your body.
    Due to the effect of alcohol,your thought and your mouth will not coordinate properly.
    A: Right
    B: Wrong
    C: Not mentioned
    查看答案
  • 共用题干
    Energy Cycle
    Do you find getting up in the morning so difficult that it's painful?This might be called laziness,but Dr. Kleitman has a new explanation. He has proved that everyone has a daily energy cycle.
    During the hours when you labor through your work you may say that you're“hot”.That's true .The time of day when you feel most energetic is when your cycle of body temperature is at its peak .For some people the peak comes during the morning. For others it comes in the afternoon or evening.No one has discovered why this is so,but it leads to such familiar monologues as:“Get up,John!You'll be late for work again!”The possible explanation to the trouble is that John is at his temperature-and-energy peak in the evening. Much family quarrelling ends when husbands and wives realize what these energy cycles mean,and which cycle each member of the family has.
    You can't change your energy cycle,but you can learn to make your life fit to it better. Habit can help,Dr. Kleitman believes. Maybe you're sleepy in the evening but you must stay up late anyway .Counteract your cycle to some extent by habitually staying up later than you want to. If your energy is low in the morning but you have an important job to do early in the day,rise before your usual hour. This won't change your cycle,but you'll get up steam and work better at your low point.
    Get off to a slow start which saves your energy .Get up with a leisurely yawn and stretch.Sit on the edge of the bed a minute before putting your feet on the floor. Avoid the trouble of searching for clean clothes by laying them out the night before .Whenever possible,do routine work in the afternoon and save tasks requiring more energy or concentration for your sharper hours.
    Which of the following may lead to family quarrels according to the passage?
    A: Unawareness of energy cycles.
    B:Familiar monologues.
    C: A change in a family member's energy cycle.
    D: Attempts to work more efficiently during the cycle of other family members.
    查看答案
  • 共用题干
    Homosexuals（同性恋者）
    Many homosexuals prefer to be called gay or,for woman,lesbian.Most of them live quiet lives just______(51)anyone else.Some gay people have always raised children,______(52)or with partners,and the use of artificial insemination（人工受精）is increasing among lesbians.
    Gay persons are in every kind of job.Some are very open about their homosexuality,and some are more private.Some______(53)their sexual orientation as a biological given and others as a choice.For those women who see it as a choice,one reason often given is the inequality in most heterosexual（异性恋的）relationships.
    Homosexuality has been common in most cultures throughout history and generally______ (54).As a result,homosexual activity became a crime,______(55)which the penalty in early courts was death.Homosexual behavior is still______(56)in many countries and the United States.
    Homosexuality later came to be viewed widely as less a sin than a sickness,but now no mentalhealth professional（具有专业资格的人）any longer ______ (57) homosexuality an illness. More recent theories to______(58)for homosexuality have included those based on biological and sociological factors.To date.______(59),there is no conclusive general theory that can explain the cause of homosexuality.
    Attitudes______(60)homosexuality began to change in the second half of the 20th century. Gays attribute this,in part,to their own struggle for their rights and pride in their orientation. Some large companies now______(61)health-care benefits to the life partners of their gay employees. Many cities also have officially appointed lesbian and gay advisory（咨询的）committees.______(62)some attitudes have changed,however,prejudice（偏见）still exists,and in the late 1980s and early 1990s,there were considerable shouts against homosexuals,with attempt to ______(63)laws forbidding the granting of basic civil rights to gays.
    The AIDS epidemic,which started in the 1980s,has devastated（毁坏）the gay community and brought it together as never before,The organized gay response to the lack of government financial support for fighting AIDS and to the needs of the thousands of AIDS victim______(64)they be gays or not,has been a model of community action.AIDS,however,has also______(65)people with another reason for their prejudice.
    _________(64)
    A:whatever
    B:however
    C:whenever
    D:whether
    查看答案
  • 共用题干
    Homosexuals（同性恋者）
    Many homosexuals prefer to be called gay or,for woman,lesbian.Most of them live quiet lives just______(51)anyone else.Some gay people have always raised children,______(52)or with partners,and the use of artificial insemination（人工受精）is increasing among lesbians.
    Gay persons are in every kind of job.Some are very open about their homosexuality,and some are more private.Some______(53)their sexual orientation as a biological given and others as a choice.For those women who see it as a choice,one reason often given is the inequality in most heterosexual（异性恋的）relationships.
    Homosexuality has been common in most cultures throughout history and generally______ (54).As a result,homosexual activity became a crime,______(55)which the penalty in early courts was death.Homosexual behavior is still______(56)in many countries and the United States.
    Homosexuality later came to be viewed widely as less a sin than a sickness,but now no mentalhealth professional（具有专业资格的人）any longer ______ (57) homosexuality an illness. More recent theories to______(58)for homosexuality have included those based on biological and sociological factors.To date.______(59),there is no conclusive general theory that can explain the cause of homosexuality.
    Attitudes______(60)homosexuality began to change in the second half of the 20th century. Gays attribute this,in part,to their own struggle for their rights and pride in their orientation. Some large companies now______(61)health-care benefits to the life partners of their gay employees. Many cities also have officially appointed lesbian and gay advisory（咨询的）committees.______(62)some attitudes have changed,however,prejudice（偏见）still exists,and in the late 1980s and early 1990s,there were considerable shouts against homosexuals,with attempt to ______(63)laws forbidding the granting of basic civil rights to gays.
    The AIDS epidemic,which started in the 1980s,has devastated（毁坏）the gay community and brought it together as never before,The organized gay response to the lack of government financial support for fighting AIDS and to the needs of the thousands of AIDS victim______(64)they be gays or not,has been a model of community action.AIDS,however,has also______(65)people with another reason for their prejudice.
    _________(61)
    A:exclude
    B:include
    C:extend
    D:intend
    查看答案

最新解决用户提交的题

  • 2024年全国保密宣传教育月的主题是()。(2024)
    A.贯彻落实保密法。你我都是护密人

    B.国家利益高于一切，保密责任重于泰山

    C.筑牢保密防线，维护国家安全

    D.共筑保密防线，公民人人有责
    查看答案
  • 使用CoreHTML删除和替换节点的方法如下:
    查看答案
  • 防范和应对企业危机的意识有哪些()。

    A.“生于忧患”的危机意识B.“童叟无欺”的诚信意识C.“顾客利益至上”的公众意识D.“无所不及”的沟通意识E.“敢于否定自我”的创新意识
    查看答案
  • 下列哪种疾病可引起呕吐伴右上腹痛、发热、黄疸()

    A.急性胃炎

    B.急性胰腺炎

    C.急性腹膜炎

    D.急性胆囊炎

    E.急性肾盂肾炎
    查看答案
  • Is there a French word that is the exact ____ of the English word “home”?
    A.
    balance
    B.
    match
    C.
    equipment
    D.
    equivalent
    查看答案