Ⅱ.阅读理解

　　(2017·重庆高考适应性考试)Some colors that people see late at night could cause signs of the condition mental health experts call clinical depression (临床抑郁症). That was the finding of a study that builds on earlier study findings. They show that individuals who live or work in low levels of light overnight can develop clinical depression.

　　Doctors use the words clinical depression to describe severe form of depression. Signs may include loss of interest or pleasure in most activities, low energy levels and thoughts of death.

　　In the new study, American investigators designed an experiment that exposed hamsters (仓鼠) to different colors. The researchers chose hamsters because they are nocturnal, which means they sleep during the day and are active at night. The animals were separated into 4 groups. One group of hamsters was kept in the dark during their nighttime period. Another group was placed in blue light, a third group slept in white light. While a fourth was put in red light. After four weeks, the researchers noted how much sugary water the hamsters drank. They found that the more depressed animals drank the least amount of water.

　　Randy Nelson, at Ohio State University, says animals that slept in blue and white light appeared to be the most depressed. 揥hat we saw is that these animals didn抰 show any sleep interruptions at all but they did have messed up circaeadian clock (生物钟) genes and they did show depressive evidence but if they were in the dim red light, they did not.” He says there’s a lot of blue in white light. This explains why the blue light and white light hamsters appear to be more depressed than the hamsters see red light or darkness.

【2016届高三英语一轮复习题组层级快练：（二十八）外研版必修5】相关文章：

★ 四川省2016届高考英语一轮复习课时作业（37） Module 1 Basketball 外研版选修8

★ 2017高考四川省广安市英语阅读理解一轮系列训练：24（含解析）

★ 【北师大版】2014届高考英语一轮复习指导课时作业：Unit 10 B卷 Word版含解析

★ （安徽专用）2014届高考英语一轮复习方案 作业手册（11）模块4 《Unit 11 The Media》（含解析） 北师大版必修1

★ 湖南省汝城二中2014届高考英语一轮复习阅读训练 (67)

★ 【人教版】2014届高考英语一轮复习指导考点针对练：选修6 unit1《Art》

★ 【优化方案】2017届高考英语二轮复习全国卷Ⅱ题型重组训练：第11组（含解析）

★ 湖南省汝城二中2014届高考英语一轮复习阅读训练 (73)

★ （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

★ 2014届高考英语一轮复习课时作业(四十二)选修7Module 6《The Worlds Cultural Heritage》（外研版）