When We Are Asleep

Everyone dreams,but some peopole never recall their dreams,or do so very rarely.Other people always wake up with vivid recollections (記憶) 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 (哺 乳動(dòng)物) studied,including dogs,monkeys,cats,and elephants,and also some birds and reptiles (爬行動(dòng)物).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.

Dreams take the form of stories,but they may be strange and with incidents not connected,which make little sense.Dreams are seldom without people in them and they are usually about people we know.One estimate says that two-thirds of the"cast"of our dream dramas are friends and relations.Vision seems an essential part of dreams,except for people blind from birth.Sound and touch are senses also often aroused,but smell and taste are not frequently involved.In"normal"dreams,the dreamer may be taking part,or be only an observer.But he or she cannot control what happens in the dream.

However,the dreamer does have control over one type of dream.This type of dream is called a"lucid"(清醒的) 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.

16.Some people dream but cannot remember their dreams.

A.Right　　B.Wrong 　　C.Not mentioned

17.In an average night,males dream longer than females.

A.Right　　B.Wrong 　　C.Not mentioned

18.When we dream,there is less movement of electrical waves in our brains.

A.Right　　B.Wrong 　　C.Not mentioned

19.Babies dream less than older children.

A.Right　　B.Wrong 　　C.Not mentioned

20.Most dreams involve the people we played with when we were young.

A.Right　　B.Wrong 　　C.Not mentioned

21.We rarely smell things in dreams.

A.Right　　B.Wrong 　　C.Not mentioned

22.In a lucid dream we can use Morse code to communicate with others.

A.Right　　B.Wrong 　　C.Not mentioned

答案：16.A 17.C 18.B 19.B 20.C 21.A 22.C

編輯推薦：

2015年職稱英語考試綜合類A級(jí)閱讀判斷鞏固練習(xí)題匯總一

2015年職稱英語考試綜合類B級(jí)完形填空練習(xí)題匯總

2015年職稱英語考試綜合類概括大意練習(xí)題匯總

2015年職稱英語考試綜合類完形填空練習(xí)題匯總

2014年職稱英語考試真題匯總

2014年職稱英語考試成績(jī)查詢時(shí)間匯總

更多關(guān)注：職稱英語教材 職稱英語考后真題點(diǎn)評(píng) 職稱英語零基礎(chǔ)通關(guān)

（責(zé)任編輯：vstara）

共2頁,當(dāng)前第1頁  第一頁  前一頁  下一頁