首页
财务会计
医药卫生
金融经济
考公考编
外语考试
学历提升
职称考试
建筑工程
IT考试
其他
登录
财务会计
共用题干 Dangers Await Babies with Altitude
共用题干 Dangers Await Babies with Altitude
恬恬
2019-12-17
28
问题
共用题干Dangers Await Babies with Altitude
Women who live in the world's highest communities tend to give birth to underweight babies, a new study suggests.These babies may grow into adults with a high risk of heart disease and strokes.
Research has hinted that newborns in mountain communities are lighter than average.But it wasn't clear whether this is due to reduced oxygen levels at high altitude or because their mothers are under-nourished—many people who live at high altitudes are relatively poor compared with those living lower down.
To find out more,Dino Giussani and his team at Cambridge University studied the records of 400 births in Bolivia during 1997 and 1998 .The babies were born in both rich and poor areas of two cities:La Paz and Santa Cruz.La Paz is the highest city in the world,at 3 .65 kilometers above sea level,while Santa Cruz is much lower,at 0 .44 kilometers.
Sure enough,Giussani found that the average birthweight of babies in La Paz was significantly lower than in Santa Cruz.This was true in both high and low-income families.Even babies born to poor families in Santa Cruz were heavier on average than babies born to wealthy families in lofty La Paz.“We were very surprised by this result,”says Giussani.
The results suggest that babies born at high altitude are deprived of oxygen before birth.
“This may trigger the release or suppression of hormones that regulate growth of the unborn child,”says Giussani.
His team also found that high-altitude babies tended to have relatively larger heads compared with their bodies.This is probably because a fetus starved of oxygen will send oxygenated blood to the brain in preference to the rest of the body.
Giussani wants to find out if such babies have a higher risk of disease in later life.People born in La Paz might be prone to heart trouble in adulthood,for example.Low birthweight is a risk factor for coronary heart disease.And newborns with a high ratio of head size to body weight are often predisposed to high blood pressure and strokes in later life.
选项
What does the new study discover?A: Babies born to wealthy families are heavier.B: Women living at high altitude tend to give birth to underweight babies.C: Newborns in cities are lighter than average.D: Low-altitude babies have a high risk of heart disease in later life.
答案
B
解析
题干问新的研究发现是什么。由第一段第一句“Women who live… tend to give birth to underweight babies. ”可知,一项新的研究发现:居住在高海拔地区的女性易生出体重不足的婴儿,故选B。 由第四段首句“…the average birthweight of babies in La Paz was significantly lower than in Santa Cruz.”可知,Giussani发现高海拔的La Paz的婴儿平均出生体重比低海拔的Santa Cruz的婴儿平均出生体重低,故选A。 由第四段末句Giussani的话“We were very surprised by this result”可知,研究结果是出乎他们的意料的,故选A。 由第五段“The results suggest that babies born at high altitude are deprived of oxygen before birth.”可知,研究结果表明,在高海拔地带出生的婴儿出生前就缺氧,这也是造成其出生体重低的原因,故选D。 由最后一段“Low birthweight is a risk factor for coronary heart disease. And newborns with a high ratio of head size to body weight are often predisposed to high blood pressure and strokes in later life”可推断,在高海拔地带出生的婴儿在以后的生活中更容易患心脏病,而且头部相对较大的新生儿在以后的生活中更易患高血压及中风,故选A。
转载请注明原文地址:https://ti.zuoweng.com/ti/hnOfKKKQ
相关试题推荐
D这是一道\"5+1\"题型的图形推理题,规律类别为组合关系。仔细地比较题干中给出的左边5个图形,不难发现,左边5个图形都是封闭图形,依据这一规律,可以推出第6个小
D这是一道\"5+1\"题型的图形推理题,规律类别为组合关系。仔细地比较题干中给出的左边5个图形,不难发现,左边5个图形,每个小图形中外图的直边数都大于内图的直边数
C这是一道\"5+1\"题型的图形推理题,规律类别为数量关系。仔细地比较题干中给出的左边5个图形,不难发现,左边5个图形,每个小图都由2种图形组成,依据这一规律,选
B这是一道“3-3-4\"类型的图形推理题,规律类别为数量关系。仔细地比较题干中给出的两套图形,不难发现,左边的一套图中包含三个图形,各图中封闭区域的数量都为3。
B这是一道“3-3-4\"类型的图形推理题,规律类别为组合关系。仔细地比较题干中给出的两套图形,不难发现,左边的一套图中包含三个图形,其中两个小图的外框为折线图,
A题干第一个图形的右上角与A的右上角相似,题干第四个图形的右下角与A的右下角相似,由此确定答案为A。组合方式如下图所示:
A题干第一个图形的右上角与A图的右上角相似、题干第四个图形的左下角与A图的左下角相似,由此可确定此题答案为A。组合方式如下图所示:
D题干四个图形依次从上往下拼接,见下图。
A题干图形的外围均是开放的,A项符合。
B题干图形依次含有1,2,3,4,5个三角形,只有B项含6个三角形。
随机试题
物流企业服务的增值性服务不包括()。 A.物流系统设计 B.库存控制决策建
临床上,寻找卵巢血管的标志是 A.卵巢悬韧带 B.子宫阔韧带 C.卵巢固有
在申请核医学检查时,临床申请医生应注意 A.根据患者的病史、体格检查及其他辅助
二维超声检查冠心病的主要根据错误的是 A.心室肌呈不均匀增厚 B.心室肌呈普
对于施工单位未经批准擅自施工或出现( )情况时,总监理工程师应签发工程暂停令。
没想到看上去弱不禁风的她______。A.竟能干出这样一番轰轰烈烈的事业来B.竞能轰轰烈烈的干出这样一番事业来C.这样一番轰轰烈烈的事业竞能
如今,每个人都说自己太忙了,但是,这些繁忙好像并不能促使事情的完成,现在,没有完成的工作,没有回的电话,以及错过的约会的数量与这些繁忙发生之前一样多。因此...
编写《中国科学技术史》的英国科技史家是( )A.莫塞莱B.布拉格C.腓尼基人D.李约瑟
以前学习雷锋,但雷锋精神已经过时了,现在要学习比尔·盖茨,你怎么看?
下列关于代理概念和代理责任的说法,正确的是( )。A.一般代理是指代理权被限定在一定范围的代理B.税务代理中,被代理人仅限于负有纳税义务的纳税人和扣缴义务人