Recent research has claimed that an excess of positive ions in the air can have an ill effect on peoples 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 fibres, 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 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, 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.
1.In accordance with the passage, static electricity can be caused by___.
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.
2.What effect does exceeding positive ionization have on some people?
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.
3.A high negative ion count is likely to be found___.
A.near a pound with a water pump.
B.close to a slow-flowing river.
C.high in some barren mountains.
D.by a rotating water sprinkler.
4.Some scientists believe that___.
A.watching animals to anticipate earthquakes is more effective than depending on seismography.
B.the unusual behavior of animals cannot be trusted.
C.neither watching nor using seismographs is reliable.
D.earthquake
5.What kind of machine can generate negative ions indoors?
A.Ionisers.
B.Air-conditioners.
C.Exhaust-fans
D.Vacuum pumps.
参考答案:
1.C 2.B 3.D 4.A 5.A
淘金高阶英语六级巅峰阅读 篇章阅读09:生活现象
淘金高阶英语六级巅峰阅读 短句问答18: 环境保护
英语六级阅读理解精炼50篇17: 人间天堂
淘金高阶英语六级巅峰阅读 篇章阅读21:汽车系统
淘金高阶英语六级巅峰阅读 短句问答28:商业经济
英语六级阅读理解精炼50篇30: 火鸡漫谈(含答案)
淘金高阶英语六级巅峰阅读 短句问答20: 自然科学
淘金高阶英语六级巅峰阅读 篇章阅读15:阅读学习
淘金高阶英语六级巅峰阅读 篇章阅读05:旅游休闲
淘金高阶英语六级巅峰阅读 篇章阅读23:声音处理
淘金高阶英语六级巅峰阅读 短句问答02:政治军事
淘金高阶英语六级巅峰阅读 篇章阅读25:视力研究
淘金高阶英语六级巅峰阅读 短句问答25:美容整形
淘金高阶英语六级巅峰阅读 篇章阅读02:体育休闲
淘金高阶英语六级巅峰阅读 短句问答08:政治人物
淘金高阶英语六级巅峰阅读 篇章阅读27:气候研究
英语六级阅读理解精炼50篇46: 回归(含答案)
淘金高阶英语六级巅峰阅读 短句问答30: 商业经济
英语六级阅读理解精炼50篇05: 身体姿势会说话(含答案)
淘金高阶英语六级巅峰阅读 短句问答16:太空探索
淘金高阶英语六级巅峰阅读 篇章阅读19:生物知识
淘金高阶英语六级巅峰阅读 篇章阅读08:家庭生活
英语六级阅读理解精炼50篇09: 语言趣话(含答案)
淘金高阶英语六级巅峰阅读 短句问答19: 人工智能
淘金高阶英语六级巅峰阅读 短句问答23:儿童健康
淘金高阶英语六级巅峰阅读 篇章阅读13:文化研究
淘金高阶英语六级巅峰阅读 篇章阅读22:饮食健康
淘金高阶英语六级巅峰阅读 篇章阅读11:移民教育
英语六级阅读理解精炼50篇03: 手势 “V”(含答案)
淘金高阶英语六级巅峰阅读 篇章阅读12:文化出版
不限 |
英语教案 |
英语课件 |
英语试题 |
不限 |
不限 |
上册 |
下册 |
不限 |