首页
登录
职称英语
Recent research had claimed that an excess of positive ions in the air could
Recent research had claimed that an excess of positive ions in the air could
游客
2023-07-18
39
管理
问题
Recent research had claimed that an excess of positive ions in the air could 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. If the 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 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 or even mental disturbance. Animals are also found to be affected, particularly before earth- quakes; 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 US 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 that 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 in 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] People should be able to come to a decision about ions in the air if they _______.
选项
A、note their own reactions
B、move to a healthier, area
C、observe domestic animals
D、watch how wealthy people behave
答案
A
解析
事实细节题。根据文章倒数第二句,人们可以通过观察负离子富含或缺乏对自己的影响作决定,即观察自己的反应,所以选A。
转载请注明原文地址:https://tihaiku.com/zcyy/2847498.html
相关试题推荐
Inanexperimentpublishedlastmonth,researchersfromtheUniversityofIl
Inanexperimentpublishedlastmonth,researchersfromtheUniversityofIl
Inanexperimentpublishedlastmonth,researchersfromtheUniversityofIl
Researchershaveidentified1.4millionanimalspeciessofar—andmillions
Researchershaveidentified1.4millionanimalspeciessofar—andmillions
Researchershaveidentified1.4millionanimalspeciessofar—andmillions
Researchershaveidentified1.4millionanimalspeciessofar—andmillions
Researchershaveidentified1.4millionanimalspeciessofar—andmillions
Researchsuggeststhatparentalinvolvementinschoolisvitaltoachild’s
Researchsuggeststhatparentalinvolvementinschoolisvitaltoachild’s
随机试题
Todaywomenearnalmost60percentofallbachelor’sdegreesandmorethan
(1)Arecomfortshoesalwaysmorehealthful?Notnecessarily,accordingtoso
Whileitseemsprettyobviousthatgratitudeisapositiveemotion,psycholo
Therearefivefactoriesinthisregion,______over100workers.A、witheachhave
D
风疹有效预防是A.口服抗病毒药物 B.静脉注射丙球 C.接种风疹减毒活疫苗
共用题干 某售房广告详细介绍了一待售商业用房的基本状况,以及购房的程序、方法、
某国议会准备用4天时间对七个议案进行讨论。讨论安排必须符合以下条件:每天最多讨
制定教学计划的首要问题是( )。A.课程设置 B.学科顺序 C.课
某高新技术企业2019年10月开业,注册资金500万元,当年签订相关合同如下:
最新回复
(
0
)