. B. Negative. C. Objective. D. Doubtful.DAY 3Light changes sleep (P5)Choose the best answer:1. What... of artificial light on teenagers’ sleep quality.D. Delaying morning schedules as a solution to our ……

us to understand it.Is your classmate yawning (打哈欠) again? He or she didn’t get enough sleep – you... tired, so often? There are many reasons why teenagers don’t get enough sleep, including hormonal (激素 ……

familiar with – our body clock, which works in a 24-hour cycle based on the light changes throughout... a light. That would make things much easier, wouldn’t it? Now it looks like you are one step ……

record (诊断证明).The body changes during sleep, making people vulnerable in the early hours, Chris... pressure, heart rate and breathing will react more rapidly.The body changes during sleep, making ……

on Earth is 1 to 1.5 percent per year. Sleep disorder (混乱)In space, the sun rises every 90 minutes. It is hard for astronauts to get used to this light-dark cycle when they sleep. Also, they need to sleep ……

? There are many reasons why teenagers don’t get enough sleep, including hormonal (激素的) changes and so... on the new study. “These morning-light-deprived (缺乏的) teenagers are going to bed later, getting less sleep ……

the days get longer.SAD symptoms can include sleep problems, changes in appetite, depression, fatigue and loss of sexual desire.The most successful treatment for SAD is light therapy: spending anywhere ……

The moon was outAnd we saw some sheep.We saw some sheepTake a walk in their sleep.By the light of the moon, by the light of the stars, They walked all night from near to far. ……

sleep troubles if you have had a major change in your life or daily routine (惯例). Changes like... the sleep you really need? When people can't fall asleep, it is called insomnia (失眠症).Why can't I ……

. They found that, compared with normal mice, these animals showed less of a response to changes in light... sleepy and at other times awake. But what controls your body clock? What changes it according ……

A remote (遥远的) control changes channels on a television set with an invisible beam (隐形光束) of light, and here’s how it works. ……

to sleep later at night and wake up later in the morning.But changes in the body clock aren't the only... that he didn't have a good sleep the night before. Many teens don't get enough sleep because they have ……

of the series.D. Excited anticipation of the opening of the Harry Potter theme park.Day 3Is “light” sleep... in the dark.B. To sleep with the light on.C. To sleep in a new environment.D. To sleep after drinking ……

sleep is not the only thing that changes with the lunar (月亮的) cycle. So does the level of tides (潮汐..., a research team in Switzerland studied the sleep patterns (模式) of 33 volunteers. In their sleep lab ……

, scientists suggested, is that too little or too much sleep causes hormonal changes that may stimulate...A CANADIAN study recently found that exactly seven hours of sleep a night could be the key ……