首页
外语
计算机
考研
公务员
职业资格
财经
工程
司法
医学
专升本
自考
实用职业技能
登录
外语
ADHD Linked to Air Pollutants Children have an increased of attention problems, seen as early as grade school, if their nose
ADHD Linked to Air Pollutants Children have an increased of attention problems, seen as early as grade school, if their nose
admin
2015-08-05
38
问题
ADHD Linked to Air Pollutants
Children have an increased of attention problems, seen as early as grade school, if their noses inhaled(吸入)a certain type of air pollution when they were pregnant. That’s the finding of a new study. Released when things aren’t burned completely, this pollution is known as polycyclic aromatic hydrocarbons, or PAHs. The biggest sources of these PAHs: the burning of fossil fuels, wood and trash.
Frederica Perera works at Columbia University’s Mailman School of Public Health in New York City. She researches how exposure to things in the environment affects children’s health. In a new study, she and her team studied the exposure to air pollution of 233 nonsmoking pregnant women in New York City. Because burning tobacco can spew(排放)PAHs into the air and lungs, Perera’s team focused on nonsmokers. The researchers wanted to probe(探查)other sources of PAHs, ones that’s would have been hard for an individual to avoid.
The team started by testing the blood of each woman during pregnancy. The reason: Any PAHs 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 problems doing things that needed sustained(长期的)mental effort, such as homework or games with friends. The scientists also asked if the kids had trouble following instructions or made frequent, careless mistakes. All of these can be symptoms of a disorder called Attention Deficit Hyperactivity Disorder, or ADHD. About one in U. S. children has ADHD.
Among the women studied, traffic and home heating were the primary sources of air pollution exposure, Perera and 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.
Nonsmoking mothers were selected because the effect of smoking on PAHs was unclear.
选项
A、Right
B、Wrong
C、Not mentioned
答案
B
解析
由第二段内容可知,研究者们选择不吸烟的妈妈,是已经知道了香烟可以释放多环芳烃,为了排除香烟对研究结果的影响,而找出其他可以排放多环芳烃的物质。因此题干叙述错误,选B。
转载请注明原文地址:https://kaotiyun.com/show/HxQd777K
本试题收录于:
职称英语理工类C级题库职称英语分类
0
职称英语理工类C级
职称英语
相关试题推荐
SomeplantsandanimalsdevelopsuperiorcharacteristicssothattheymayTheauthorcitesthebehaviorofwarm-bloodedmammals
Manypuremetalshavelittleusebecausetheyaretoosoft,rusttooeasily,orhavesomeotherdrawback.
Peoplearoundtheglobehittheheightoftheirmiseryanddepressionin(51)age,anewinternationalstudysuggests.The
Mothersandmatchmakers(媒人)havealwaysknownthatnotbeingmarriedisadefinitehealthhazard.Butwhenateamofresearchers
RelievingthePain"Exercisemaybethebesttreatmentofchronicpain,"saydoctorsatanewclinicfordealingwithpain
HitchhikingWhenIwasinmyteens(十几岁)and20s,hitchhikingwasamainformoflong-distancetransport.Thekindnessorcu
HitchhikingWhenIwasinmyteens(十几岁)and20s,hitchhikingwasamainformoflong-distancetransport.Thekindnessorcu
A.bythequakeitselfB.notbepreventedC.tocausedamageofpropertyandlossoflivesD.ofapossibleearthquakeE.theu
Theyaretryingtoidentifywhatiswrongwiththepresentsystem.
Heissureofahouse-buildingboomafterthenewinvestmentpoliciesareputintopractice.
随机试题
驾驶机动车遇到这种情况要如何行驶?
ARF出现下列哪些情况时应选择透析疗法
标准差与标准误都是常用的变异指标,二者看起来很相似,但含义却相差很大。下面的几种表述中,最恰当的一项是
输血后7~14天发生的输血并发症是
张某,男,肝硬化致门静脉高压症,分流手术前的护理哪项正确( )。【历年考试真题】
天元公司和地方公司签订建设工程施工合同,约定由地方公司承建天元公司位于A市的写字楼。并在合同中约定了仲裁条款:凡因本合同所发生之一切纠纷,均提交B市仲裁委员会仲裁,但适用C仲裁委员会的仲裁规则。天元公司在后续检查中发现地方公司将工程转包于丙公司,并未按照合
2019年2月,中国居民按照与图书公司签订的合同取得稿酬20000元,则杨某取得稿酬所得的应纳税收入额为()元。
土地使用制度是在不改变城市土地国有的条件下,采取()等方式将土地使用权有偿、有限地出让给土地使用者。
设X~N(μ,σ2),且P{X≤σ}>P{X>σ},则μ/σ().
DearSirs,IwillgraduatefromtheShanghaiInstituteofForeignTradethisyear.AsastudentofEnglishforBusiness,Ih
最新回复
(
0
)