首页
登录
职称英语
Recent research has claimed that an excess of positive ions (离子) in the air
Recent research has claimed that an excess of positive ions (离子) in the air
游客
2023-07-18
26
管理
问题
Recent research has 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 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 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 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 (易受攻击的) 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 (批评者), 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 exceeding positive ionization have on some people?
选项
A、They think they are insane.
B、They feel rather bad-tempered and short-fussed.
C、They become violently sick.
D、They are too tired to do anything.
答案
B
解析
可定位在第2段第1句:When a large number of positive ions are present…or even mental disturbance.本句指出当空气中产生大量正离子时,很多人有不良反应,如头疼(headaches)、疲劳(fatigue)、易怒(irritability),一些特别敏感的人甚至会感觉恶心甚或心烦意乱(mental disturbance),而选项B中的bad-tempered和shot-fussed正是此意,故选项B正确。
转载请注明原文地址:https://tihaiku.com/zcyy/2848738.html
相关试题推荐
Researchfindingsshowwespendabouttwohoursdreamingeverynight,______(不管白天
Farewell,Libraries?Amazon,corn’srecentannounc
Farewell,Libraries?Amazon,corn’srecentannounc
Farewell,Libraries?Amazon,corn’srecentannounc
[originaltext]Oldagemaynotsoundexciting.Butrecentfindingsoffergoo
Researchonfriendshiphasestablishedanumberoffacts,someinteresting,
Researchonfriendshiphasestablishedanumberoffacts,someinteresting,
Researchonfriendshiphasestablishedanumberoffacts,someinteresting,
Researchonfriendshiphasestablishedanumberoffacts,someinteresting,
[originaltext]W:John,youlookterrific.Areyouworkingoutrecently?Yousur
随机试题
Fiftyyearsago,mostpeople’sdailylevelsofactivitywereequivalenttow
止于大转子尖的肌肉是()A.髂腰肌 B.臀大肌 C.臀中肌 D.
证券X的期望收益率为0.11,贝塔值是1.5,无风险收益率为0.05,市场期望收
1966年,联合国教科文组织通过的《关于教师地位的建议书》提出师德理想的目标不包
经过复杂的化学变化而形成树脂的多为植物体内的A:黄酮类B:蒽醌类C:生物碱类
A.利多卡因 B.氯胺酮 C.普鲁卡因 D.盐酸丁卡因 E.氟烷可用于治
关于我国现行金融中介体系的说法,错误的是()。A.中国人民银行是我国的中央银行
对下列规范性文件所作的判断中,不正确的是()。A.西藏自治区人民代表大会发布的
图示电路中,电路原已达稳定,设i=0时开关S断开,则开关S断开后的电感电流i(t
根据《规划环境影响评价条例》,对规划进行环境影响评价,应当分析、预测和评估的内容
最新回复
(
0
)