Who knows about sleep? Astronauts (宇航員). They have to. Their bodies are cut off from the outside world that reminds (提醒) us what time it is. But actually, it's even worse than that. An astronaut reported in his diary that he was likely to make mistakes on days following an unusually late bedtime.

So NASA started doing some serious research. They quickly realized that we're a slave to the outside world. Without light and darkness, we' re unable to regulate (管理) sleep times.

Because of modern technology, we're all living more like astronauts now. Light is no longer a function (功能) of the sun, but of always-on indoor lights, TV and computer screens. Temperature no longer follows a cycle of cooling at night and warming during the day. Is it any wonder that a third of Americans have sleep problems?

Maybe you think this doesn't affect you — or at least not much. You're wrong. Research done on non-astronauts has shown the same thing. After two weeks of six hours of sleep a night; you're drunk. By the end of two weeks, the six-hour sleepers behaved as badly as those who hadn't slept for 24 hours.

But what did they say when asked how they felt? "It's not affecting me." So if you are performing poorly because of sleep problems, you may have no idea. This is a real problem.

So what answers did NASA come up with?

Take an hour to calm down before bed. Yes, you're busy. But your time is not more valuable than an astronaut's.

Keep your bedroom dark, cool and free from noise. Even if you think "the light doesn't affect you" or "the noise isn't that bad", it can still affect sleep quality.

Another advice: forget the alarm clock (鬧鐘) in the morning; set an alarm to remind you to go to bed at night. When it goes off, finish up any work on the computer, and turn off any unnecessary lights. This prevents you from cheating yourself on sleep and allows you to wake up naturally.

1. What did NASA find about people’s sleep?

A. It takes a long time to develop regular sleep times.

B. It’s strongly influenced by the outside world.

C. It remains untouched by outside influences.

D. It’s hard to change one’s sleep habits.

2.The biggest problem of those who haven’t enough sleep lies in the fact that .

A. they can’t fall asleep without the lights on

B. they don’t know whether they sleep well

C. they refuse to regulate their sleep times

D. they get too drunk to sleep well

3. What does the underlined sentence in the text mean?

A. You should make full use of your time.

B. You can find the time to get ready to sleep.

C. You can sleep later to finish your work first.

D. You should learn from astronauts’ way of sleep.

4. What’s the advice on the alarm clock?

A. Use it to remind you to sleep.

B. Put it far away from your bed.

C. Get up immediately when it rings.

D. Pay no attention to it when it rings.

練習(xí)冊系列答案
相關(guān)習(xí)題

科目：高中英語 來源：2015-2016學(xué)年貴州遵義航天高級中學(xué)高二3月考英語試卷（解析版） 題型：完形填空

完形填空

閱讀下面短文，從短文后各題所給的四個(gè)選項(xiàng)（A、B、C和D）中，選出可以填入空白處的最佳選項(xiàng)。

Learning is a continuous process of life. We all learn from ___________ thing in life. One of the things that ___________ me recently is what I learned from turtles(龜).

Turtles could teach a vast number of people a lot about reaching goals. ___________ , have you ever watched turtles making their way to a stream? Turtles ___________ where they are going. In other words, they have set a goal. Many people ___________ go through life with no specific goals in mind. They seem to weave(穿行) back and forth because their life direction seems to ___________ in relation to whatever influences them at the time.

Turtles, on the other hand, have a set goal in mind ___________observed by taking the time to watch them. Turtles have only one ___________ . No matter how long it takes them, they will do everything they can to ___________ their objective.

Sure, turtles may be ___________ . But they keep going. Each step they take, no matter how small, keeps them ___________ to their destination. They never ___________ a step or break into a run. The reason is that turtles have a better ___________ of the necessity of taking small steps over and over again to reach final victory.

The ___________ thing about turtles is that they have hard shells. The significance of this shell is to help ___________ themselves from anything that may attack them. And, as turtles taught me, we also need to develop a hard shell ___________ those that would want us to fail.

___________ , turtles told me that the greatest characteristic to ___________ in reaching a goal is perseverance(堅(jiān)持不懈). No matter what the obstacle is, there is a(n) ___________ around it. No matter how many times one is ___________ by negativity, there is strength in belief.

1.A. unusual B. important C. practical D. different

2.A. impressed B. worried C. disturbed D. excited

3.A. As a consequence B. In other words C. For example D. Above all

4.A. accept B. know C. forget D. search

5.A. unfortunately B. unhappily C. surprisingly D. eventually

6.A. grow B. expand C. follow D. change

7.A. luckily B. hardly C. easily D. deeply

8.A. instruction B. direction C. guide D. position

9.A. reach B. match C. receive D. desert

10.A. smart B. sweet C. shy D. slow

11.A. higher B. closer C. farther D. straighter

12.A. reject B. move C. skip D. meet

13.A. sense B. smell C. taste D. trick

14.A. rest B. last C. extra D. other

15.A. remove B. protect C. prevent D. separate

16.A. beyond B. through C. against D. among

17.A. Gradually B. Finally C. Clearly D. Mostly

18.A. possess B. inform C. include D. apply

19.A. end B. tip C. path D. entrance

20.A. praised B. blamed C. inspires D. stopped

查看答案和解析>>

科目：高中英語 來源：2016屆北京豐臺區(qū)高三下期綜合練習(xí)（一）英語試卷（解析版） 題型：單項(xiàng)填空

About 10 million dolphins are said ________ in the past 15 years.

A. to have killed B. to kill

C. to have been killed D. to be killed

查看答案和解析>>

科目：高中英語 來源：2016屆安徽蕪湖馬鞍山市高三第一次教學(xué)質(zhì)量監(jiān)測英語試卷（解析版） 題型：語法填空

閱讀下面材料，在空白處填入適當(dāng)?shù)膬?nèi)容（1個(gè)單詞）或括號內(nèi)單詞的正確形式。

More than half of all Chinese have a smartphone. They reach for it the moment they wake up, keeping it in hand all day. At 1. (party), more people are on their smartphones than on their drinks. In addition, too many people are using smartphones while 2. (drive). And as a result, many car accidents happen every day on the road. Drivers confirm that text messaging is their number one driving interruption. Smartphones are unbelievably becoming more important than the lives of 3. (them) and others. As many.people take risks just 4. (send)a text or check their messages, smartphones are 5. many ways very dangerous to people.

The smartphone 6. (affect) our desire to communicate face to face with others. Besides, it is lowering people's competence to communicate. In many cases, some people check or send text messages in the presence of a friend , 7. means that the person they are texting is more important. Most 8. (serious), relying on smartphones to make friends does not give us 9. same advantage as making new friends in the real world. Face-to-face conversations will give us much 10. (strong) communication skills in the long run.

查看答案和解析>>

科目：高中英語 來源：2015-2016學(xué)年山東武城縣二中高一3月考英語試卷（教師版） 題型：書面表達(dá)

書面表達(dá)

假設(shè)你是某國際學(xué)校的學(xué)生會主席李華，你校將舉辦一次英語演講比賽。請你根據(jù)以下要點(diǎn)，用英語寫一份書面通知。

英語演講比賽

1. 主題：如何尊敬父母；

2. 時(shí)間：11月6日下午3點(diǎn)；地點(diǎn)：校會堂；

3. 演講時(shí)長：每人6至8分鐘；

4. 報(bào)名地點(diǎn)：校學(xué)生會辦公室；截止時(shí)間：11月3日下午5點(diǎn)。

注意：1. 詞數(shù)100左右；2. 可適當(dāng)增加細(xì)節(jié)，以使行文連貫。

查看答案和解析>>

科目：高中英語 來源：2015-2016學(xué)年江西貴溪實(shí)驗(yàn)中學(xué)高一上期中考試英語試卷（解析版） 題型：閱讀理解

People have flown kites in Japan for more than 1,000 years. There are different kinds of kites there.Some look like bats（蝙蝠）；others look like birds. Most have pictures on them．There are many interesting stories about kites in Japan．One story tells about a thief（小偷）who used a kite.He wanted to steal（偷）the gold（金子）from the top of a high tower．The thief and his friends made a large kite.One dark windy night he caught hold of the kite．His friends raised（使升高）it into the air．Then they moved the kite near the top of the tower．The thief was able to steal the gold.Another story tells about a father and a son．They were in trouble on an island near Japan.The father made a large kite．His son flew in it back to Japan．

The young men of Japan have kite matches.When the kites are flying, the match starts．The young men try to break each other’s kite strings（細(xì)繩）. The last kite left in the sky is the winner．

1.Most kites in Japan________．

A. look nice with pictures B. are very small

C. look like hats D. are very large

2.In the kite match the young men try to________．

A. make their kites fly high

B. draw beautiful pictures on their kites

C. make very large kites themselves

D. stop each other’s kites from flying in the sky

3.The father in the passage made a large kite to help his son to________．

A. fly over the sea B. fly over the island

C. return home D. steal gold

4.The passage mainly（主要地）tells us________．

A. something about the kites in Japan

B. how a kite match starts

C. how to fly kites

D. what the kites look like

查看答案和解析>>

科目：高中英語 來源：2015-2016學(xué)年黑龍江海林林業(yè)局一中高一上期末英語試卷（解析版） 題型：完形填空

完形填空

閱讀下面短文，從每題所給的A,B,C,D,四個(gè)選項(xiàng)中，選出可以填入空白處的最佳選項(xiàng)

Do you know _____ languages there are in the world? There are about 1,500 but many of them are no very _____ .English is one of the most important languages because many people _____ it, not only in England and America, _____ in other countries of the world． About 200,000,000 speak it _____ their own language, and another 200,000,000 use it as_____language. It is _____ to say how many people are learning it. _____ boys and girls in schools are trying to do so. Many English children study French. French is also a very important language. _____ children study German, Russian, Japanese and Chinese. Which is the best_____ to learn a language? We know that we all learnt _____language well when we were_____if we learn a second language in the _____ way,it won’t seem so difficult. What does a small child do? It _____ what people say, and it tries to guess what it hears. When it wants something, it has to _____ it. It is using the language , _____ in it and talking in it all the time .If people use a second language _____ , they will learn it_____ . In school, you learn to read, to write, to hear and to speak. It is best to learn all new words through the _____ . You can read them , spell them and _____ them later.

1.A．how many B．what number C．a(chǎn) lot of D．so many

2.A．useful B．necessary C．Important D．good

3.A．like B．use C．learn D．speak

4.A．but B．a(chǎn)nd C．a(chǎn)lso D．so

5.A．like B．with C．for D．a(chǎn)s

6.A．foreign B．a(chǎn) second C．the second D．a(chǎn) special

7.A．easy B．a(chǎn)gain C．difficult D．best

8.A．Millions of B．Million of C．Millions D．Several million

9.A．Some B．Another C．All D．Few

10.A．time B．way C．thing D．place

11.A．a(chǎn) foreign B．our mothers’ C．other’s D．our own

12.A．born B．children C．grown D．boys

13.A．same B．different C．useful D．good

14.A．does B．a(chǎn)s C．listens to D．follows

15.A．a(chǎn)sk B．want C．get D．a(chǎn)sk for

16.A．speaking B．writing C．thinking D．doing

17.A．some time B．sometimes C.all the time D．for the time

18.A．quickly B．soon C．freely D．hardly

19.A．mouth B．hands C．ears D．mind

20.A．listen B．use C．love D．Write

查看答案和解析>>

科目：高中英語 來源：2015-2016學(xué)年廣東北大附中深圳南山分校高二下第一次段考英語卷（解析版） 題型：語法填空

語法填空

閱讀下面材料，在空白處填入適當(dāng)?shù)膬?nèi)容或括號內(nèi)單詞的正確形式。

Many years ago there was such a child with the name Hokey ___1.___ father brought home a mirror. Hokey had never seen one before so when he saw it for_2.__ first time, he didn’t understand _3.___ it was, but he saw another boy in the mirror, which made him very happy, for he thought the boy had come to play with him. He spoke to the stranger in a very friendly way, but received no reply. He laughed and waved at the boy, who did ___4.__ (exact) the same thing. Then he thought, “I’ll go closer. It may be because he doesn’t hear me.” But when he began to talk, the other boy imitated him.

Hokey stopped___5.___(think) about these strange actions, saying to himself.，“This boy is fooling me. He does everything that I do.” The more he thought about it, the ___6.__(angry)he became and soon he noticed the boy became very angry too. So Hokey _7.___(strike) the boy in the glass, but he only hurt his own hand and went__8.__(cry) to his father, who said, “The boy you saw was ____9.___ image. This should teach you an important lesson, my son. You should never show your anger to others. Now remember that in real life when you strike__10.___ cause you will hurt yourself most of all..

查看答案和解析>>

科目：高中英語 來源：2015-2016學(xué)年湖南瀏陽一中高二下第一次階段測試英語卷（解析版） 題型：完形填空

完形填空閱讀下面短文，理解大意，從題中所給的A,B,C,D四個(gè)選項(xiàng)中選出一個(gè)最佳答案。

Last spring，I was fortunate to be chosen to participate in an exchange study program. In my application letter，I was careful to _____ how much I wanted to see France；evidently，my excitement really came through in my words. Once I _____ that I was going，all I could think about was the fun of foreign travel and making all sorts of new and _____ friends. While traveling was inspiring and meeting people was _____ ，nothing about my term in France was what I _____ .

The moment I arrived in Paris，I was _____ by a nice French couple who would become my host parents. My entire experience was joyous and exciting _____ I received some shocking news from my program coordinator(協(xié)調(diào)人）；there had been a death in my host parents' extended family. They had to travel outside France for several weeks. That afternoon，I had to _____ out of one family’s house and into another. The exchange coordinator told me I'd have a _____ this time and asked whether I could share a bedroom with an English speaker. To avoid the temptation(誘惑）to _____ my native language，I asked not to be _____ with an English-speaking roommate. When I got to my new room, I _____ myself to my new roommate Paolo; a Brazilian(巴西人），the same age as I，whom I was surprised to find playing one of my favorite CDs！In just a few hours，we knew we’d be good friends for the rest of the _____ .

I left France with many _____ ，so when people ask me what my favorite part of the trip was，they are always _____ to hear me talk about my Brazilian friend Paolo and the scores of weekdays in class，weeknights on the town，and weekends _____ France we enjoyed together. I love how people _____ seem so different，but end up being so _____ ．The most valuable lesson I gained from studying in France wasn’t just to respect the foreign people _____ to respect all people，for your next best friend could be just a continent away. I would recommend an exchange program to anyone who wants to experience foreign cultures and gain meaningful _____ ．

1.A. express B. announce C. argue D. discuss

2.A. knew B. warned C. denied D. approved

3.A. anxious B. universal C. interesting D. stubborn

4.A. upsetting B. exciting C. promising D. boring

5.A. liked B. doubled C. feared D. expected

6.A. witnessed B. greeted C. supported D. sponsored

7.A. when B. since C. while D. until

8.A. travel B. walk C. rush D. move

9.A. leader B. roommate C. colleague D. housekeeper

10.A. appreciate B. speak C. master D. learn

11.A. fitted B. involved C. placed D. combined

12.A. introduced B. devoted C. adapted D. added

13.A. week B. month C. vacation D. term

14.A. suitcases B. stories C. dreams D. presents

15.A. disturbed B. embarrassed C. concerned D. surprised

16.A. exploring B. describing C. investigating D. analyzing

17.A. had to B. would rather C. can D. need

18.A. independent B. similar C. distant D. generous

19.A. but B. or C. so D. and

20.A. friendships B. facts C. data D. instructions

查看答案和解析>>

同步練習(xí)冊答案