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
2024-06-08
13
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 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. [br] People should ______ when deciding wheher to have a negative rich environment.
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
细节题 见最后一段倒数第二句...people can only make up their own minds by observing the effects on themselves,or on others,of a negative rich or poor environment.
转载请注明原文地址:https://tihaiku.com/zcyy/3624809.html
相关试题推荐
Theyclaimedthatthebombattackwas______(对恐怖分子被关押而实施的报复).inrevengeforthe
Researchersinthefieldofpsychologyhavefoundthatoneofthebestways
Researchersinthefieldofpsychologyhavefoundthatoneofthebestways
[originaltext]Ateamofscientistsrecentlybeganaprojecttomeasurethe
[originaltext]Arecentfilm,TheGodsMustBeCrazy,describedthesocialc
[originaltext]Arecentfilm,TheGodsMustBeCrazy,describedthesocialc
"IamgeneralmanageroftherecentlyestablishedBritishdivisionofasmal
"IamgeneralmanageroftherecentlyestablishedBritishdivisionofasmal
"IamgeneralmanageroftherecentlyestablishedBritishdivisionofasmal
Untilabout30yearsago,languageresearchersfocusedtheirstudiesoninfan
随机试题
Theratiooftheworkdonebythemachine______theworkdoneonitiscalledt
[originaltext]ProfessorsfromYaleUniversityagreedinapaneldiscussion
[originaltext]M:Mathdepartment,ProfessorWebsterspeaking.W:Hello,Prof.W
Justbecauseyou’retheboss,doesn’tmeanyouarerighteverytime.Itdoes
下列业务的会计核算中,需要通过“应交税费——应交增值税(销项税额)”科目核算的有
直肠癌多发于A.直肠上1/3处 B.齿状线附近 C.直肠乙状结肠交界处 D
地方导游员在阅读接待计划时,要对其中的重点或疑难之点做()。A.汇报 B.记录
刚体作平面运动,某瞬时平面图形的角速度为ω,角加速度为α,则其上任意两点A、B的
牙内陷中疾病最轻的类型是A.畸形舌侧窝 B.畸形中央尖 C.畸形根面沟 D
男,50岁,中度肥胖,空腹血糖8mmol/L,餐后2小时血糖12mmol/L,胰
最新回复
(
0
)