When We Are Asleep
Everyone dreams,but some people never recall their dreams,or do so very rarely. Other people always wake up with vivid recollections of their dreams,though they forget them very quickly. In an average night of eight hours sleep,an average adult will dream for around one hundred minutes,probably having three to five dreams,each lasting from ten to thirty minutes. Scientists can detect when someone is having a dream by using an instrument which measures the electrical waves in the brain. During dreaming, these waves move more quickly. Breathing and pulse rate also increase,and there are rapid eye movements under the lids, just as though the dreamer were really looking at moving objects. These signs of dreaming have been detected in all mammals studied, including dogs, monkeys, cats, and elephants, and also some birds and reptiles . This period of sleep is called the D state for around 50% of their sleep;the period reduces to around 25% by the age of 10.
However, the dreamer does have control over one type of dream. This type of dream is called a lucid dream. Not everyone is a lucid dreamer. Some people are occasional lucid dreamers. Others can dream lucidly more or less all the time. In a lucid dream,the dreamer knows that he is dreaming.
A. Right B. Wrong C. Not mentioned
A. Right B. Wrong C. Not mentioned
A. Right B. Wrong C. Not mentioned
A. Right B. Wrong C. Not mentioned
A. Right B. Wrong C. Not mentioned
A. Right B. Wrong C. Not mentioned
A. Right B. Wrong C. Not mentioned
2019-2020天津外大附校七上英语期中卷
2019届湖南省衡阳市高三英语二模试题
2019届吉林省长春市高三英语二模试题答案
2019届江苏省连云港市高三英语二模试题
2019年唐山一中高考英语冲刺卷(三)
2019-2020-1长郡集团九上期中考试
2019届上海市松江区高三英语二模试题答案
2019届上海市崇明区高三英语二模试题答案
2019届陕西省咸阳市高三英语二模试题答案
2019届陕西省咸阳市高三英语二模试题
2019届呼和浩特市高三英语二模试题答案
2019届上海市松江区高三英语二模试题
江苏无锡市东林中学2019-2020学年期中试卷
2019-2020太原七上期中英语试题
2019年唐山一中高考英语冲刺卷(二)
2019届山东省青岛市高三英语二模试题答案
2019届呼和浩特市高三英语二模试题
2019届山西省高三英语二模试题
重庆南开(融侨)中学初2020届九年级上套题训练
2019届广东省广州市高三英语二模试题
2019届广东省潮州市高三英语二模试题
广东深大附中2019-2020学年期中考试初三英语试卷
山西忻州市师院附中2019-2020学年初三英语月考试题
2019年唐山一中高考英语冲刺卷答案(一)
2019届山东省青岛市高三英语二模试题
2019届湖南省岳阳市高三英语二模试题答案
2019年唐山一中高考英语冲刺卷(一)
2019届湖南省岳阳市高三英语二模试题
2018-2019陕西西安莲湖70中高一第下三月月考英语试题
2019年唐山一中高考英语冲刺卷答案(二)
不限 |
英语教案 |
英语课件 |
英语试题 |
不限 |
不限 |
上册 |
下册 |
不限 |