2014年大学英语六级阅读专项练习3
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 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.
effect does exceeding positive ionization have on some people?
think they are insane. feel rather bad-tempered and short-fussed. become violently sick. are too tired to do anything.
accordance with the passage, static electricity can be caused by___. g home-made electrical goods. ing clothes made of natural materials. ing on artificial floor coverings. ing TV programs on a computer.
3.A high negative ion count is likely to be found___. a pound with a water pump. e to a slow-flowing river. in some barren mountains. a rotating water sprinkler.
kind of machine can generate negative ions indoors?
sers. -conditioners. ust-fans um pumps.
scientists believe that___. hing animals to anticipate earthquakes is more effective than depending on seismography. unusual behavior of animals cannot be trusted. her watching nor using seismographs is reliable. hquake
答案BCDAA
-
2014日语能力考N2复习要点汇总
语法复习要点问题7有12道小题,保持了原有的考题模式。出示一个句子,要求从四个选项中选择一个符合句子含义的正确答案。这个考题既有我们过去接触过的选择一级语法条目的考题,也有将1级语法条目融会在词组或者小短句子当中作为选项出题。总之,只要掌握了过去的一级...
-
2016日本语能力测试三级阅读训练题
日语等级考试是由日本国际交流基金及其财团法人日本国际教育交流协会举办,自1984年开始实施,是专为母语为非日语的学习者举办的一种日语能力的等级考试。下面是yjbys网小编提供给大家关于日本语能力测试三级阅读训练题,希望对大家的备考有所帮助。篇一:東京私は、...
-
2015年12月日语等级考试报名工作
2015年12月日语等级考试报名时已经公布,大家可以跟着小编按以下四步做报名准备。一、弄清自己现阶段的日语水平方式1:根据自身所学进度确认日语专业:如果现在还在大一,那么12月份可以挑战一下N3,明年上半年参加N2的考试。大二的同学建议报名12月份的N2。大三大四了,...
-
学习职称日语的10大法则
学好一门语言除了勤奋以外,更讲求的是方法。下面小编将给大家介绍学习职称日语的10大法则,希望帮助同学们学好职称日语。1.三皮法则要想征服日语,首先,头皮要硬!无论碰到多大的困难,也不要放弃!其次,嘴皮要勤!时时刻刻操练;俗话说:拳不离手,曲不离口!只有嘴皮勤,才能把...