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
2023-12-23
22
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] What effect does exceeding positive ionization have on some people?
选项
A、They think they are insane.
B、They feel rather bad-tempered and short-fused.
C、They become violently sick.
D、They are too tired to do anything.
答案
B
解析
转载请注明原文地址:https://tihaiku.com/zcyy/3298134.html
相关试题推荐
Itisfoundintheresearchthatthelowerclasseshavemoreempathywithpeople
Itisfoundintheresearchthatthelowerclasseshavemoreempathywithpeople
Itisfoundintheresearchthatthelowerclasseshavemoreempathywithpeople
Itisfoundintheresearchthatthelowerclasseshavemoreempathywithpeople
Itisfoundintheresearchthatthelowerclasseshavemoreempathywithpeople
Recentresearchrevealedthatitisacommonbiologicalphenomenontoshedskin
Whatisthemaintopicofthepassage?[originaltext]Myteenagesonrecently
AnarticlepublishedrecentlyintheprestigiousscientificjournalNaturei
AnarticlepublishedrecentlyintheprestigiousscientificjournalNaturei
[originaltext]W:RecentlyartistSamuelCliffandwriterDanArchertookourre
随机试题
[originaltext]Whatreallyworkstomakesustainablechangesindietandlifesty
[audioFiles]2016m9s/audio_ezfj_029_201609[/audioFiles]Children’
关于外科感染,叙述不正确的是()A.疖是指一个毛囊及其皮脂腺的化脓性感染 B
通过核算分析,不断优化施工过程、施工机械的管理方法,最终达到增收节支,获得更大的
强心苷对心肌正性肌力作用机理是()A.减慢房室传导 B.促进儿茶酚胺释放
根据迈克尔波特的理论,竞争战略可分为()。A.差异化战略 B.前向一体化战略
有关保荐代表人制作或者出具的文件不齐备或者不符合要求的,下列说法正确的是( )
要申请小额信用贷款,农户应首先向当地农村信用合作社申请办理( )。A.社员卡
首席风险官不履行职责的,中国证监会及其派出机构可以依照( )对首席风险官采取监
液态智力的发展模式表现为()。 (A)在成人阶段呈缓慢上升的趋势 (B)在
最新回复
(
0
)