Sleep We all know that the normal human daily cycle of some 7-8 hours sleep alternating with some 16-17 hours wakefulness and that, broadly speaking, the sleep normally coincides with the hours of darkness. Our present concern is win how easily and to what extent this cycle can be modified. The question is no more academic one. The case, for example, with which people can change from working in the day to working at night is a question of growing importance industry where automation calls insistently for round-the-clock working of machines. It normally takes from five days to one week for a person to adapt to a reversed of sleep and wakefulness, sleeping during the day and working at night. Unfortunately it is often the case in industry that shifts are changed every week; a person may work from 12 midnight to 8 a.m. one week , 8 a.m. to 4 p.m. the next, and 4 p.m. to 12 midnight the third and so on. This means that no sooner has he got used to one routine than he has to change to another, so that much of his time is spent neither working nor sleeping very efficiently. One answer would seem to be longer periods on each shift, a month, or even three months. Recent research by Bonjer of the Netherlands, however, has shows that people on such systems will revert to their normal habits of sleep and wakefulness during the week-end and that this is quite enough to destroy any adaptation to night work built up during the week. The only real solution appears to be to hand over the night shift to a corps of permanent night workers whose nocturnal wakefulness may persist through all weekend and holidays. An interesting study of the domestic life and health of night-shift workers was carried out by Brown. She found a high incidence of disturbed sleep, digestive disorder and domestic disruption among those on alternating day and night shifts, but no abnormal occurrence of these symptoms among those on permanent night work. 1. The question raised in Paragraph 1 is no mere academic one A)because Bonjers findings are different from Browns. B)because sleep normally coincides with the hours of darkness. C)because some people can change their sleeping habits easily. D)because shift work in industry requires people to change the sleeping habits. 2. According to the passage, the main problem about night work is that A) people hate the inconvenience of working on night shifts. B) your life is disturbed by changing from day to night routines and back. C) not all industries work at the same hours. D) it is difficult to find a corps of good night workers. Key:DB
英语六级外刊阅读练习:社交媒体和后隐私社会
英语六级阅读练习:现代建筑林立凸显伦敦塔不受尊重
2013年6月英语六级考试快速阅读练习题与解析(28)
2013年大学英语六级考试六级阅读理解专项练习Passage 2
2013年6月英语六级考试备考深度阅读试题模拟与解析(14)
2012年12月暑期英语六级备考阅读每日一练 0807
2013年6月英语六级考试备考深度阅读试题模拟与解析(15)
2013年6月英语六级考试备考深度阅读试题模拟与解析(3)
2012年12月暑期英语六级备考阅读每日一练 0804
2013年最新的英语六级阅读练习题及答案2
2013年6月英语六级考试备考深度阅读试题模拟与解析(13)
2013年大学英语六级考试六级阅读理解专项练习Passage 3
外刊阅读练习:伦敦暴乱与政府消减开支的实际联
2013年6月英语六级考试备考深度阅读试题模拟与解析(18)
2013六级阅读资料:全球变暖致今年春季过早来临
2013年6月英语六级考试备考深度阅读试题模拟与解析(21)
2013年6月英语六级考试备考深度阅读试题模拟与解析(12)
2013年大学英语六级考试六级阅读理解专项练习 08
2012年12月暑期英语六级备考阅读每日一练 0806
2013年大学英语六级考试六级阅读理解专项练习与解析 06
2013年英语六级考试备考快速阅读试题模拟与解析(22)
2013年6月英语六级考试备考深度阅读试题模拟与解析(20)
2013年6月英语六级考试备考深度阅读试题模拟与解析(17)
2013英语四六级外刊阅读:过分追求美食的孩子
外刊阅读与练习:旧金山成为繁荣城市的原因
2013年大学英语六级考试六级阅读理解专项练习Passage 4
2013英语六级考试阅读理解专项练习与解析(五)
2013年6月英语六级考试备考深度阅读试题模拟与解析(8)
2013年大学英语六级考试六级阅读理解专项练习与解析
2013年最新的英语六级阅读练习题及答案1
不限 |
英语教案 |
英语课件 |
英语试题 |
不限 |
不限 |
上册 |
下册 |
不限 |