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
88
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
OnedayTombought,fortwodollars,alargenumberofusedbooks:Heputthemina【B1】andpulledthemtothe【B2】Hewasto【
—CouldIborrowyourdictionary?—Yes,of,course,you______.
—Therewerealreadyfivepeopleinthecarbuttheymanagedtotakemeaswell.—It______acomfortablejourney.
ThemainideaofthepassageisthatJapan______.WithwhichofthefollowingstatementswouldtheauthorprobablyNOTagree?
WhatkindofnewspaperistheCommunityNews?
Whenthesunstartedtoset,Jimheadedforhome.Hehadhuntedlongenough.Justthenhesawthereis,30feetinfrontofhim,
Howdidthedriverpossiblygointothechurch?Whenthepriestwasgivinghisservice________.
Whatnationalityisthewoman?
______doeshewritewell,______healsospeakswell.
Fromthepassageweknowthat"thegreenhouseeffect"isaneffectinwhich______.Whichofthefollowingsentencesistrue?
随机试题
拉坦前列腺素属于
市场经济中宏观调控的主要方式是间接调控,采用指导性计划。()
对房地产价格敏感度分析时,一般来说,有()。
关于商品的价格与供求的关系,下列说法中不正确的有( )。
甲公司为增值税一般纳税人,适用的增值税税率为17%。2015年开始建造某生产线,购入一台设备,购买价格为1000万元,增值税额为170万元,支付保险、装卸费用50万元。该生产线安装期间,领用生产用原材料的实际成本为100万元,发生安装工人工资等费用10万元
房地产开发项目应当按照土地使用权出让合同约定的动工期限开发建设,超过1年未动工开发的,政府可以征收相当于土地使用权出让金()以下的土地闲置费。
【2013年山东烟台.判断】注意是一种独立的心理过程。()
虽然中国现行文物法规中还缺少直接针对世界文化遗产的具体条款,虽然世界文化遗产的概念与内涵和我国的文物保护单位还不能简单对接,但是中国遗产保护的实践充分证明,文物法的基本精神以及党和国家文物工作的方针,完全适用于世界文化遗产领域。世界文化遗产的特性与各级文物
设有定义在(-∞,+∞)上的函数:以x=0为第二类间断点的函数是________.
在具有多媒体功能的微型计算机中,常用的CD-ROM是()。
最新回复
(
0
)