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
2023-09-12
38
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] 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://tihaiku.com/zcyy/3008540.html
相关试题推荐
Researchersinthefieldofpsychologyhavefoundthatoneofthebestways
Researchersinthefieldofpsychologyhavefoundthatoneofthebestways
Researchersinthefieldofpsychologyhavefoundthatoneofthebestways
Theyperseveredintheirresearch,______(无论情况多么不利).nomatterhowadverse/unfav
[originaltext]Ateamofscientistsrecentlybeganaprojecttomeasurethe
[originaltext]Ateamofscientistsrecentlybeganaprojecttomeasurethe
[originaltext]Arecentfilm,TheGodsMustBeCrazy,describedthesocialc
"IamgeneralmanageroftherecentlyestablishedBritishdivisionofasmal
Untilabout30yearsago,languageresearchersfocusedtheirstudiesoninfan
Untilabout30yearsago,languageresearchersfocusedtheirstudiesoninfan
随机试题
MywifeandIspenttwoweeksinLondonlastyear.Wewentthereinthe【11】W
【B1】[br]【B16】A、sideB、bandC、teamD、partyC从信息词even得知,此处是递进关系,所给的选项中,只有team可以
青藏高原(Qinghai-TibetPlateau)是中国最大、世界海拔最高的高原,约占中国领土面积的四分之一,其中大部分地区非常偏远。不适宜人类居住
纳洛酮结构中17位氮原子上的取代基是()。A:甲基 B:烯丙基 C:环丁基
根据《著作权法》,著作权人决定作品是否公之于众的权利称为( )。A.发表权 B
关于内因性均称型胎儿生长受限正确的是A.多属于继发性胎儿生长受限 B.体重、身
赋予股东优先认股权的目的有() ①保证普通股票股东在股份公司中保持原有的持股
患者,女,31岁,发热,全身酸痛,轻度黄疸半个多月,伴有酱油色尿。实验室检查:H
简述现代企业人力资源管理各个历史发展阶段的特点。
A.6周 B.2~3周 C.10天 D.14天 E.3~5天分娩后产妇分
最新回复
(
0
)