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. 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. 1. The question raised in Paragraph 1 is no mere academic one B)because sleep normally coincides with the hours of darkness. D)because shift work in industry requires people to change the sleeping habits. A) people hate the inconvenience of working on night shifts. C) not all industries work at the same hours. 3. According to the passage, the best solution on the problem seems to be B) to make periods on each shift longer. D) to find ways of selecting people who adapt quickly. A) the third week C) a third of the time 5. In the last sentence of the second paragraph, another means B) another shift D) another person
2016年小学英语二年级寒假作业题设计
小学二年级英语寒假作业布置
猴年来了:盘点与猴有关的经典电影
2016年小学二年级英语上册寒假作业答案
猎犬追随参赛者脚步 轻松拿下半程马拉松第七名
离不开手机电脑?小心“数码视觉疲劳”
看澳网必学网球词汇
2016年三年级上册英语寒假作业设计
《老友记》和《生活大爆炸》主演携手拍特辑
2016年小学一年级寒假英语作业:观看原版英文电影
国外品牌名的经典翻译
小学二年级英语寒假作业答案
2050年海洋中的塑料会比鱼还多
小学三年级寒假作业英语答案参考
昨天被“红包照片”刷屏了吗?
高效工作的15个秘诀
小学三年级上册英语寒假作业答案
“春运大考”来啦
今冬新热潮:玩转冷冻牛仔裤
20个特别地道的英语用法,据说中国学生都不熟
新起点英语三年级寒假作业单
小学三年级寒假作业英语答案
2016年小学三年级英语寒假作业参考答案
奇葩工作大盘点 看有没有你的菜
《中国的核应急》白皮书双语全文
“最忙独董”被查
据说单身久了,内心独白会变成这样……
古装剧《还珠格格》拍动画片
2016年小学三年级英语寒假作业设计
小学二年级英语寒假作业题布置
不限 |
英语教案 |
英语课件 |
英语试题 |
不限 |
不限 |
上册 |
下册 |
不限 |