首页
登录
职称英语
[originaltext] Recent research has claimed that an excess of positive ions i
[originaltext] Recent research has claimed that an excess of positive ions i
游客
2023-09-12
46
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. 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 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, 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, 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.
选项
A、To prevent disasters.
B、To mobilize urgent aids.
C、To predict earthquakes.
D、To explore vulnerable areas.
答案
C
解析
转载请注明原文地址:https://tihaiku.com/zcyy/3008385.html
相关试题推荐
[originaltext]WhenpeterandRosecametotheUnitedStatesfromthePhilip
[originaltext]WhenpeterandRosecametotheUnitedStatesfromthePhilip
[originaltext]WhenpeterandRosecametotheUnitedStatesfromthePhilip
[originaltext]Todayschoolchildreninmanycountrieshavehighratesoffa
[originaltext]Todayschoolchildreninmanycountrieshavehighratesoffa
[originaltext]Aftertravelinginacrowdedbusandwaitinginthenoisyair
[originaltext]Aftertravelinginacrowdedbusandwaitinginthenoisyair
[originaltext]W:Hi,Sam,IhatetobotheryoubutIwonderifIcouldhaveaw
[originaltext]W:Howdoyoufindyournewapartment?M:Well,it’squitenicere
[originaltext]W:Howdoyoufindyournewapartment?M:Well,it’squitenicere
随机试题
[originaltext]W:IwassoexcitedthatIcouldn’tfallasleeplastnight.M:I
AgriculturalNewsFoodandAgricultureinTwenty-fiveYea
Competitionforadmissiontothecountry’stopprivateschoolshasalwaysbe
EdgarPoe,anAmericanwriter,wasbornin1809.Hisparentswereactors.Ed
患者男性,38岁,尿毒症,血压185/110mmHg,心率60次/分,ECG显示
突然发生的呼吸困难,疑为气管支气管异物时,为明确诊断须采取的措施为A.强心剂
在()中,要求T日成交的证券交易的交收在成交日之后的第三个营业日(T+3)完成。
基础心理学是研究()。 (A)正常成人心理现象的心理学基础学科 (B
IT系统的低压配电线路,当发生第一次接地故障时,应采用的电器是()。A.漏电电
患者男,38岁。井下作业时发生塌方砸伤背部,当即倒于地上,下肢无力不能行走,立即
最新回复
(
0
)