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 has claimed that an excess of positive ions in the air can have an ill effect on people’ s physical or psycholog
Recent research has claimed that an excess of positive ions in the air can have an ill effect on people’ s physical or psycholog
admin
2010-05-09
35
问题
Recent research has claimed that an excess of positive ions 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 (电荷). But sometimes this balance becomes disturbed and a larger proportion of positive ions are found. This happens naturally before thunderstorms, earthquakes or when winds such as the Mistral, Foehn, Hamsin or Sharav 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 fibres, 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 or even mental disturbance. Animals are also found to be affected, particularly before earthquakes; snakes have been observed to come out of hibernation, rats to flee from their burrows, dog howl and cats jump about unaccountably. This has led the U.S. Geographical Survey to fund a network of volunteers to watch animals in an effort to foresee such disasters before they hit vulnerable areas, such as California.
Conversely, when large numbers of negative ions are present, 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 ionisers: small portable machines which generate negative ions. They claim that ionisers 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 (地震的) readings to anticipate earthquakes is more effective than watching the cat.
What effect does excessive positive onisation have on some people?
选项
A、They think they are mad.
B、They feel very tired.
C、They become violently sick.
D、They are too tired to do anything.
答案
B
解析
细节题 见第二段第一句When a large number of positive ions are present in the airmany people experience unpleasant effects,such as headaches,fatigue...
转载请注明原文地址:https://kaotiyun.com/show/rOOK777K
0
大学英语六级
相关试题推荐
Weshould______(提倡顾全大局).
Whatisthemainideaofthepassage?WhatisthespaceatQuincyMarketnowusedfor?
Inwhatwayishistoryimportanttous?TheexampleprovidedinParagraph3isusedtoillustratetheideathat______.
A、Becauseitwasoneofthefirsttools.B、Becauseitdevelopedhumancapacities.C、Becauseitledtotheinventionolmachines.
ARVshaven’tbeenusedwidelytopreventHIVtransmissionorinfectionforlackofmoney.Dr.PeterDiotbelievesthatitmayb
InthepastthirtyyearsIranhasbeendoingsecretlythenuclearenrichmentwork,whichisadirectchallengetotheUnitedSta
WhilelisteningtoBush’speptalk,theRepublicans______.ThepresidentJohnsonwasdefeatedbytheDemocratsin1965because_
A、HowtostudyItalianGrammar.B、HowtoenlargeherItalianvocabulary.C、HowtoimproveherspeakingandlisteninginItalian.
InNovember1965,NewYorkwasblackedoutbyanelectricityfailure.The【B1】______promisedthatitwouldnothappenagain.Pe
A、HowAswanDamWasBuilt.B、HowHollandSolvedItsDrainageProblem.C、TransportingwithCanalBoats.D、CanalsandTheirUses.
随机试题
甲公司2014年12月31日的资产负债表如下:公司2014年的销售收入为100000元,销售净利润为10000元,净利润的50%分配给投资人。公司的资产除固定资产以外都随销售量的增加而增加;负债及所有者权益中,只有应付费用和应付账款随销售量同比变化
下列选项中,不符合神经纤维传导兴奋特性的是
肾虚导致肝虚,属于肝强导致脾弱,属于
在审计过程中,如果发现被审计单位有错误或舞弊的可能性,则注册会计师应作出的反应包括()。
以下关于组织咨询含义的说法,正确的是()。
著作被称为“活的教育学”的教育家是()。
初民生活中灵对肉,精神对物质的压抑主要表现在巫术的运用及神话的造作上,通过巫术与神话,他们使周围的世界秩序化,从而变得可以理解,不再那么狰狞可怖,为自己建构了一个相对安宁的庇护所。在此过程中,他们所使用的工具便是语言,语言是一种暴力,强制性地加在与它没有任
阅读材料回答46—50题:究竟什么是“庸俗、低俗、媚俗”?社会各界存在着不同的认识。“雅”本来是“夏”,指的是周王朝统治的核心地区,相当于我们今天说的“文化中心地区”。而“俗”指的是其他地区。我们不能说非文化中心地区的文化,就比中心地区“低下”,
【一条鞭法】南京大学2013年中国古代史真题;黑龙江大学2013年中国史真题;陕西师范大学2015年历史地理学真题;复旦大学2016年历史地理学真题
在窗体上画一个名称为Command1的命令按钮,并编写如下事件过程:PrivateSubCommand1_Click()x=1s=0Fori=1To5x=x/i
最新回复
(
0
)