The light is disrupting the body clock, which stems from our evolutionary past when we were active when it was light in the day and resting when it was dark at night. Light alters mood, physical strength and even the way we process food in a 24­hour cycle. Artificial light is known to disrupt the body clock by delaying the production of the sleep hormone melatonin.

　　Prof. Derk­Jan Dijk said there would be no harm in trying to make bedrooms darker. He told the BBC：“People in general are not aware of the light present in their bedroom. I think people should assess their bedroom and see how easy it would be to make it darker.”Street lights, some alarm clocks and standby lights on electrical equipment such as televisions could light a room, he said.“Overall this study points to the importance of darkness，”he concluded.

　　语篇解读：本文是一篇说明文。主要介绍了卧室里的亮度对人们健康的影响：过于强烈的光线会影响人体的生物钟，影响人的情绪，还有可能使人肥胖。

　　8．The passage mainly tells us________.

　　A．bright bedrooms link to obesity

　　B．dark bedrooms link to obesity

　　C．people should turn off lights

　　D．people should buy thicker curtains

　　解析：选A　主旨大意题。第一段第一句点明了文章的主题，即有研究表明，在光线太强的房间里睡觉可能会导致体重增加。故选A项。

【2017届高考英语一轮复习考点落实练：Unit 15《Learning》（北师大版含解析）】相关文章：

★ 【三维设计】2017版（江苏专用）二轮复习练习：必修1 Unit 2《Growing pains》课时跟踪检测B卷（含解析）

★ 【人教版】2014届高考英语一轮复习指导考点针对练：选修6 unit3《A healthy life》

★ 湖南省汝城二中2014届高考英语一轮复习阅读训练 (37)

★ 湖南省岳阳市2014高考英语一轮单项选择训练题（17）及答案

★ 2014高考英语（新人教版）一轮基础训练（15）A、B卷（附答案或解析）

★ 2014年牛津译林版高中英语总复习（第1轮）同步练习 M2《Unit 2　Wish you were here》Word版含解析

★ 2017届高考英语二轮复习大题冲关秘籍完形填空之记叙文：解题技巧（含解析）

★ 2014届高考英语一轮复习课时作业(二十五)必修5Module 1《British and American English》（外研版）

★ （安徽专用）2014届高考英语一轮复习方案 作业手册（23）模块8 《Unit 23 Conflict》（含解析） 北师大版必修1

★ （安徽专用）2014届高考英语一轮复习方案 作业手册（15）模块5 《Unit 15 Learning》（含解析） 北师大版必修1