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
Recent research had claimed that an excess of positive ions(离子)in the air can have an ill-effect on people’s physical or psychol
Recent research had claimed that an excess of positive ions(离子)in the air can have an ill-effect on people’s physical or psychol
admin
2016-06-25
48
问题
Recent research had claimed that an excess of positive ions(离子)in the air can have an ill-effect on people’s physical or psychological health. What are positive ions? Well, the air is full of ions, electrically charged particles, and generally there is a rough balance between the positive and the negative charges. But sometimes this balance becomes disturbed and a larger proportion of positive ions are found. This happens naturally before thunderstorms, earthquakes or when winds are blowing in certain countries. Or it can be caused by a build-up of static electricity indoors from carpets or clothing made of man-made fibers, or from TV sets, duplicators or computer display screens.
When a large number of positive ions are present in the air many people experience unpleasant effects such as headaches, fatigue, irritability, and some particularly sensitive people suffer nausea(恶心)or even mental disturbance. Animals are also found to be affected, particularly before earthquakes; snakes have been observed to come out of hibernation(冬眠), rats to flee from their burrows, dogs howl and cats jump about unaccountably. This has led the US Geographical Survey to fund a network of volunteers to watch animals in all effort to foresee such disasters before they hit vulnerable areas such as California.
Conversely, when large numbers of negative ions are present, then people have a feeling of well-being. Natural conditions that produce these large amounts are near the sea, close to waterfalls or fountains, or in any place where water is sprayed, or forms a spray. This probably accounts for the beneficial effect of a holiday by the sea, or in the mountains with tumbling streams or waterfalls.
To increase the supply of negative ions indoors, some scientists recommend the use of ionizers; small portable machines which generate negative ions. They claim that ionizers not only clean and refresh the air but also improve the health of people sensitive to excess positive ions. Of course, there are the detractors, other scientists, who dismiss such claims and are skeptical about negative/positive ion research. Therefore people can only make up their own minds by observing the effects on themselves, or on others, of a negative rich or poor environment.
After all, it is debatable whether depending on seismic readings to anticipate earthquakes is more effective than watching the cat.
According to the passage, static electricity can be caused by______.
选项
A、using home-made electrical goods
B、wearing clothes made of natural materials
C、walking on artificial floor coverings
D、copying TV programs on a computer
答案
C
解析
由题干static electricity定位在首段末句,用人造纤维做成的地毯或衣物可能产生静电。man—made“人造的”相当于artifi—cial。故C为答案。文中仅提到电视机、复印机和电脑显示屏会产生静电,而A说法太笼统了,所以不选。
转载请注明原文地址:https://kaotiyun.com/show/8XRd777K
本试题收录于:
公共英语四级笔试题库公共英语(PETS)分类
0
公共英语四级笔试
公共英语(PETS)
相关试题推荐
Thedemoralizingenvironment,decrepit(老朽的)buildingandminimalmaterialsmakethehighschoolexperienceforthesechildr
【61】Whiletherearealmostasmanydefinitionsofhistoryastherearehistorians,modernpracticemostcloselyconformstoone
OnehundredandthirteenmillionAmericanshaveatleastonebank-issuedcreditcard.Theygivetheirownersautomaticcreditin
Accordingtogovernmentstatistics,menofallsocialclassesinBritainvisitpubsquiteoften,【21】______thekindofpubthe
Accordingtogovernmentstatistics,menofallsocialclassesinBritainvisitpubsquiteoften,【21】______thekindofpubthe
ReadthefollowingtextcarefullyandthentranslatetheUnderlinedsegmentsintoChinese.Yourtranslationshouldbewrittencl
【61】Sincethedawnofhumaningenuity,peoplehavedevisedevermorecunningtoolstocopewithworkthatisdangerous,boring,
Mostpeoplewhotravellongdistancescomplainofjetlag(飞行时差综合症).Jetlagmakesbusinesstravelerslessproductiveandmorepro
Well,nogainwithoutpain,theysay.Butwhataboutpainwithoutgain?EverywhereyougoinAmerica,youheartalesofcorporat
Tourismisoneofthemostpromisingindustriesofthelastfewyears.Inmostcountriesthereareofficialorganizationstoenc
随机试题
真热假寒证最突出的证候表现是()
A.简易程序B.一般程序C.听证程序D.复议程序行政机关对法人当场作出的500元罚款,适用的程序是()。
下列案件属于行政诉讼受案范围的有:
下列因素中,不易引起电气线路火灾的是()。
收款凭证左上角的借方科目可以是()。
内部控制自我评价报告的主要内容不包括()。
下面不属于软件测试实施步骤的是
信号が 赤から 青————変わった。
AdviceforStudents:HowtoTalktoProfessorsI.IntroductionA.Professors:normalpeople,justlikeeveryoneelseB.Student
()贸易管制()付款条件()有争议()无效
最新回复
(
0
)