首页
登录
职称英语
Recent research had claimed that an excess of positive ions in the air could
Recent research had claimed that an excess of positive ions in the air could
游客
2024-02-19
17
管理
问题
Recent research had claimed that an excess of positive ions in the air could 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. If the balance becomes disturbed and a larger proportion of positive ions are found. This happens naturally before thunderstorms, earthquakes or when winds such as the Mistral, Foehn, 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 or even mental disturbance. Animals are also found to be affected, particularly before earth- quakes; 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, 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 that 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 in 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] A high negative ion count is likely to be found _______.
选项
A、near a pond with a water pump
B、close to a slow-flowing river
C、high in some barren mountains
D、by a rotation water sprinkler
答案
D
解析
推理判断题。第三段第二句谈到负离子多的地方是离水近的地方,比如海边,瀑布和喷泉边,有水花喷溅或有喷雾形成的地方,可以推断水度越快越易产生负离子,所以选D,排除其他答案。
转载请注明原文地址:https://tihaiku.com/zcyy/3463761.html
相关试题推荐
[originaltext]AmotherinTamilNadu,India,recentlyhadaquestionforou
A、Becauseitisthelocalcustom.B、BecauseanotherlocalcoupleclaimedBaby81
[originaltext]W:Whathaveyoubeenuptorecently?M:Burningthemidnightoil
Manypeopleviewretirementasatimetostopworking.Butnewresearchshow
Manypeopleviewretirementasatimetostopworking.Butnewresearchshow
Manypeopleviewretirementasatimetostopworking.Butnewresearchshow
ApaperpublishedbytworesearchersattheUniversityofLondonclaimstop
TherecentslowdownintheUSeconomyislikelytohavea(n)______impactonth
Heclaimedthatitwasherrudenessthat______himtostrikeher.A、proposedB、pro
Thescientistshaveabsolutefreedomastowhatresearchtheythinkitbestto__
随机试题
[originaltext]M:First,Iwanttothankyoufordoingthissurvey.Thisisano
Itiscustomaryforadultstoforgethowhardanddullandlongschoolis.T
Onaverage,Americankidsages3to12spent29hoursaweekinschool,eigh
特别值得一提的是,司马迁不仅参考皇家的历史记录,还走遍中国求证信息的真伪。Whatisparticularlyworthmentioningisth
三、教学语言技能 (一)教学语言技能的含义 教师在课堂上
采用3m直尺进行路面平整度测定时,应首尾相接连续测量()尺。A.3 B.5
注册会计师在与治理层沟通补充事项时,以下各项中不恰当的沟通内容是( )。A、注
碘量法测定维生素C的含量的方法中不包括A.使用新沸过的冷水,是为了减少水中溶解氧
当消费函数是一条通过原点且向右上方倾斜的直线时,则()。A.边际消费倾向递增
在必要情况下,收到检举材料和处理检举的相关部门及人员可以将被检举人姓名和检举材料
最新回复
(
0
)