首页
登录
职称英语
Recent research had claimed that an excess of positive ions(离子) in the air c
Recent research had claimed that an excess of positive ions(离子) in the air c
游客
2024-06-17
18
管理
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 buildup 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 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.
选项
A、using home-made electrical goods
B、wearing clothes made of natural materials
C、walking on artificial floor coverings
D、copying TV programs on a computer
答案
C
解析
细节题。由题干static electricity定位在首段末句,用人造纤维做成的地毯或衣物可能产生静电。man-made“人造”相当于artificial。故C为答案。文中仅提到电视机、复印机和电脑显示屏会产生静电,而A说法太笼统了,所以不选。
转载请注明原文地址:https://tihaiku.com/zcyy/3638577.html
相关试题推荐
Mysisterhasrecentlygotajobasa(reception)______inahotel.receptionist
A—ResearchandAnalysisI—FeedbackandEvaluationB—RoleofDepartmentsJ—Publ
A—ResearchandAnalysisI—FeedbackandEvaluationB—RoleofDepartmentsJ—Publ
A—ResearchandAnalysisI—FeedbackandEvaluationB—RoleofDepartmentsJ—Publ
Competitionwithresearchinuniversitiesisveryharmfultoteaching.There
Competitionwithresearchinuniversitiesisveryharmfultoteaching.There
Competitionwithresearchinuniversitiesisveryharmfultoteaching.There
Researcherssaypeopletravelingintrafficarethreetimesmorelikelytos
Researcherssaypeopletravelingintrafficarethreetimesmorelikelytos
Recentstudiesshowthatemployeeswhotakevacationtimeandleaveare______th
随机试题
Whatissocialworkinbroadsense?[br][originaltext]Somesaysocialwork
Womenhavelongbeenmoreinnumberthanmenoncollegecampuses.Theyalso
[originaltext]W:Whatapity.Wecouldn’tseeStarWarslastnight!M:Yes,it
在不同企业中,工作内容基本相同的岗位,薪酬却存在较大差距,其原因可能是()。A
建设项目施工和地质勘查需要临时使用国有土地或者农民集体所有的土地的,由( )批
2000国家大地坐标系与现行国家大地坐标系转换、衔接的过渡期为()A:8年B:
已知数控机床操作工2014年的甲产品单件定额工时为52.785小时,乙产品单件定
2018年3月5日,乙县宏志路小学三年级四班家长微信群中有传言称,有一群外地人贩
付款请求权是第二序请求权。()
最新回复
(
0
)