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 psych
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 psych
admin
2011-05-16
56
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.
What effect does excessive positive ions 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
题干中的excessive对应的是第二段首句中的a large number of“过多的,大量的”,而B中的very tired与此句中的fatigue“疲劳”相对应,所以应选B。
转载请注明原文地址:https://kaotiyun.com/show/pCxd777K
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
Overthepastcentury,allkindsofunfairnessanddiscriminationhavebeencondemnedormadeillegal.Butoneinsidiousformco
MarathonraceinterviewDistance(kilometers)ofthemarathon______1Numberofrunners
Intheworldofentertainment,TVtalkshowshaveundoubtedlyfloodedeveryinchofspaceondaytimetelevision.Andanyonewho
AprominentgroupofBritishuniversityteachersthisweekcalledonthefundingcouncilstostopsupportinglow-qualityresearc
Travelingcanbefunandeasy.Avacationtriptoanothercountryisespecially【21】______whenthetravelingconditionsareg
Accordingtogovernmentstatistics,menofallsocialclassesinBritainvisitpubsquiteoften,【21】______thekindofpubth
Studiesoftheeffectthatmakesmanyofusslumberorfeelsleepyduringthequeen’sspeechonChristmasDayhaverevealedthat
LastweekendKyleMacDonaldinMontrealthrewapartytocelebratethefactthathegothisnewhomeinexchangeforaredpaper
Securityandcommodityexchangesaretradingpostswherepeoplemeetwhowishtobuyorsell.Theexchangesthemselvesdonotra
ReutersExtelFinancial
随机试题
汉语中的动态助词“了”只能用于过去时。()
Inthesamewaythatachildmustbeabletomovehisarmsandlegsbeforehecanlearntowalk,thechildmustphysiologically
肾虚型产后身痛的首选方剂为肾阴亏虚型产后小便淋痛的首选方剂为
通过椎旁静脉系统发生转移的是
根据《建设工程施工合同(示范文本)》(GF一1999一0201),如果干扰事件对工程的影响持续时间长,承包则应按工程师(监理人)要求的合理间隔,提交中间索赔报告,并在干扰事件影响结束后的()天提交一份最终索赔报告。
增值税一般纳税人购进的下列服务中进项税额不能从销项税额中抵扣的有()。
自学作为一种培训方式,其优点不包括()。
高校课程的纵向结构包括普通教育课程、基础课程、________和专业课程。
A、Manystudentscan’tgetupdatedonlineinformation.B、Manystudentsdonotmakethemostuseofprintedbooks.C、Manystudents
A、ConveniencesbroughttoconsumersthroughtheuseoftheInternet.B、ImplicationsoftheincreasingcommercialuseoftheInte
最新回复
(
0
)