首页
登录
职称英语
Recent research has claimed that an excess of positive ions in the air can h
Recent research has claimed that an excess of positive ions in the air can h
游客
2025-01-14
27
管理
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 charged. But sometimes this balance becomes disturbed and a larger proportion of positive ions are found. This happens naturally before thunderstorm, earthquakes when winds such as the Mistral, 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 affected, particularly before earthquakes, snakes have been observed to come out of hibernation, rats to flee from their burrows, dogs 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, 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 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 readings to anticipate earthquakes is more effective than watching the cat. [br] In accordance with 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
转载请注明原文地址:https://tihaiku.com/zcyy/3912695.html
相关试题推荐
[originaltext]AccordingtoarecentreportbytheUNEP,ifcarnumberskeep
[originaltext]AccordingtoarecentreportbytheUNEP,ifcarnumberskeep
Recentyearshavebroughtminority-ownedbusinessesintheUnitedStatesunp
Recentyearshavebroughtminority-ownedbusinessesintheUnitedStatesunp
Recentresearchhasclaimedthatanexcessofpositiveionsintheaircanh
Recentresearchhasclaimedthatanexcessofpositiveionsintheaircanh
Recentresearchhasclaimedthatanexcessofpositiveionsintheaircanh
Inthecaseofmobilephones,changeiseverything.Recentresearchindicate
Inthecaseofmobilephones,changeiseverything.Recentresearchindicate
[originaltext]QuestionNo.6Accordingtosomeresearchers,menwhoeatcooked
随机试题
(Let’snot)wastetimeon(mattersofnoimportant).Wehaveother(vital)probl
________isthestudyofhowsentencesarestructured.A、SemanticsB、SyntaxC、Pho
Therelationshipbetweenprofessionalsportsclubsandtheirplayersisperh
Theseaisthelargestunknownpartofourworld.Itcovers【B1】______percen
某公司2011年的息税前利润为1000万元,利息费用为100万元,适用的所得税税
关于移动互联网关键技术,以下描述错误的是()A.Android是一种基于Lin
下列各项中,属于我国出台的针对各类国有资产的取得、使用、流转、收益等管理活动的法
生活事件是诱发心理问题的一种( )原因。A、生物性 B、物质性
追风透骨丸(处方) 制川乌100g,白芷100g,制草乌100g,香附(制)1
建设工程施工承包合同的计价方式采用变动单价时,合同中可以约定合同单价调整的情况有
最新回复
(
0
)