首页
外语
计算机
考研
公务员
职业资格
财经
工程
司法
医学
专升本
自考
实用职业技能
登录
外语
Recent research had claimed that an excess of positive ions (离子) in the air can have an ill-effect on people’s physical or psych
Recent research had claimed that an excess of positive ions (离子) in the air can have an ill-effect on people’s physical or psych
admin
2015-08-09
57
问题
Recent research had claimed that an excess of positive ions (离子) 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. But sometimes this balance becomes disturbed and a larger proportion of positive ions are found. This happens naturally before thunderstorms, earthquakes or when winds 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 (恶心) or even mental disturbance. Animals are also found to be affected, particularly before earthquakes; snakes have been observed to come out of hibernation(冬眠), 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 all 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 ionizers : small portable machines which generate negative ions. They claim that ionizers 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.
What effect does excessive positive ions 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
题干中的excessive对应的是第二段首句中的a large number of“过多的,大量的”,而B中的very tired与此句中的fatigue“疲劳”相对应,所以应选B。
转载请注明原文地址:https://kaotiyun.com/show/6QRd777K
本试题收录于:
公共英语四级笔试题库公共英语(PETS)分类
0
公共英语四级笔试
公共英语(PETS)
相关试题推荐
TheInternetraisesmajorissuesandchallengesforeducation,notjustinChinabutallovertheworld.Yetitsimplycannot
Comparisonsweredrawnbetweenthedevelopmentoftelevisioninthe20thcenturyandthediffusionofprintinginthe15thand1
Scientistsbelievethatpeople"dressedup"longbeforetheymadeahabitofwearingclothes.Primitivemandressedhimselfinf
RealpolicemenhardlyrecognizeanyresemblancebetweentheirlivesandwhattheyseeonTV.Thefirstdifferenceisthata
WhydosomanyAmericansdistrustwhattheyreadintheirnewspapers?TheAmericanSocietyofNewspaperEditorsistryingtoans
ThepeoplemostlikelytogethookedinInternetare______.
Thegovernmentistobanpaymentstowitnessesbynewspapersseekingtobuyuppeopleinvolvedinprominentcases【21】______
ReutersExtelFinancial
随机试题
单位内部会计监督,可通过()在处理会计业务过程中进行。
某汽车进出口公司进口50辆德国产小轿车,每辆车上附带一套法国生产的维修工具。进口报关时,维修工具的原产国应按小轿车填报为德国。()
出现在顶部的看跌的形态是()。
在应对被审计单位因提前确认营业收入而导致的特别风险时,注册会计师应当()。
教师素质的核心是教师的人格素养。()
偏见只能在交流中被慢慢校正,绝不可能通过封闭而稍有消解,封闭只能导致更多更大的偏见发生。这段文字的意思是:
代理技术产生的原因有需求拉动和()。
从简单页式存储管理方案发展到虚拟页式存储管理方案,页表项中通常需要增加的信息有()。
Hurryup.MyMother______forusinthezoo.
•Lookatthenotesbelow.•Someinformationismissing.•Youwillhearamancallingtobookconferencerooms.•Foreach
最新回复
(
0
)