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东亚银行招聘英语考试题及参考答案

东亚银行招聘英语考试题及参考答案

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.
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