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
American doctors say mothers who smoke cigarettes may slow the growth of their children’ s lungs (肺). They said reduced lung gro
American doctors say mothers who smoke cigarettes may slow the growth of their children’ s lungs (肺). They said reduced lung gro
admin
2009-08-15
113
问题
American doctors say mothers who smoke cigarettes may slow the growth of their children’ s lungs (肺). They said reduced lung growth could cause the children to suffer breathing problems and lung diseases (疾病) later in life. Doctors studied more than 1 100 children between the ages of five and nine. The mothers of some of the children smoked; the other mothers did not. Doctors tested the children once a year for five years to see how fast their lungs were growing. The test measured the amount of air the children could blow out of their lungs in one second. Children should be able to blow out more air each year because their lung-power increases as their lungs develop. But the doctors found that the lungs of the children whose mothers smoked had not developed as fast as they should. Doctors are not sure when the mothers’ smoking affected (影响) the children’s lungs. They say it could have happened before birth because the mothers smoked during pregnancy (怀孕) or it could have happened later when the children breathed smoke-filled air at home. Doctors also are not sure if reduced lung growth will affect the children’ s health when they have grown up. But they do know that children whose mothers smoked developed 20% more colds, flu (流感) and other breathing diseases than other children. So doctors feel there is a greater danger that such children will develop serious lung and breathing diseases later in life. Another recent study found that smokers have a greater chance of developing lung cancer (癌症,肿瘤) if their mothers smoked. That study found that the danger of lung cancer increased only for sons and .not for daughters. And it found that father’s smoking did not affect a person’s chances of developing lung cancer.
选项
A、Ten times.
B、Five times.
C、Once.
D、Twice.
答案
B
解析
文章提到,Doctors tested the children once a year for five years to...一年检查一次,五年当然是检查五次,选B。
转载请注明原文地址:https://kaotiyun.com/show/46fd777K
本试题收录于:
公共英语二级笔试题库公共英语(PETS)分类
0
公共英语二级笔试
公共英语(PETS)
相关试题推荐
【B1】【B15】
【B1】【B12】
【B1】【B4】
Mostanimalsmovefromoneplacetoanotheratacertaintimeto______.Whatisthemainideaofthepassage?
Inthesecondparagraph,theunderlinedwords"thebuilding"mostprobablyreferto______.Agreenbuildingisoftenbuilton
______doeshewritewell,______healsospeakswell.
Whowasfirstrescuedfromthesea?
Whowasfirstrescuedfromthesea?
WhathappenedtoWinstonChurchillin1954?
随机试题
_______是构建稳定销售服务渠道的基础。
一般而言,当出现()时,证券市场行情不会上升。
关于组织设计与组织文化之间关系的说法,正确的是()。
设△ABC的内角A、B、C的对边长分别为a、b、c,cos(A—C)+cosB=,b2=ac,求∠B.
疯狂扩散的蓝藻起初并没有使人们感到(),往年正常情况下,它顶多影响太湖的一些景观,不会带来什么骚乱。雨季一来,这些小生物会被大量的雨水冲刷稀释,人们会渐渐()它,直到第二年的来临。还有一些农民把它们捞起来当肥料,()地称之为“海油”。
①我的食物基本都不是我自己做的,衣服更是一件都没做过②用我们的专长来表达是唯一的方式——因为我们不会写鲍勃.迪伦的歌或汤姆.斯托帕德的戏剧③我想大多数创造者都想为我们得以利用前人取得的成就表达感激④我并没有发明我用的语言或数学⑤我们很多人都想回馈社
有两个关系R和S如下:则有关系R得到关系S的操作是
FalseFearofBigFishManypeoplebelievesharks(鲨鱼)aredangerousandwillalwaystrytohurtorevenkillhumans.【B1】____
Everymaninthiscountryhastherighttolivewherehewantsto,_____thecolorofhisskin.
WashingtonIrvingwasAmerica’sfirstmanofletterstobeknowninternationally.Hisworkswerereceivedenthusiasticallyboth
最新回复
(
0
)