Some people can stay up all night and still get work done the next day.I'm not one of them.After a night without enough sleep, I feel bad?tempered.I have trouble remembering things.And all I want to do is to crawl into bed and sleep.
How do you feel after you've stayed up late to finish schoolwork? Or the day after an overnight party? Scientists now say that your answers to these questions may depend on your genes.
New research suggests that a gene called “period 3” affects how well you function without sleep.The “period 3” gene comes in two forms:short and long.Everyone has two copies of the gene.So, you may have two longs, two shorts, or one of each.Your particular combination depends on what your parents passed on to you.
Scientists from the University of Surrey in England studied 24 people who had either two short or two long copies of “period 3”.Study participants had to stay awake 40 hours straight.Then,they took tests that measured  how quickly they pushed a button when numbers flashed on screen and how well they could remember lists of numbers.
Results showed that the people with the short form of “period 3” performed much better on these tests than the people with the long form did.In both groups,people performed worst in the early morning.
After the first round of experiments,participants were finally allowed to sleep.People in the group that performed well on the tests (those with the short form of “period 3”) took about 18 minutes to nod off.
People with the long “period 3” gene, by contrast, fell asleep in just 8 minutes.They also spent more time on deep sleep.That suggests that people with the long form of the gene need more and deeper sleep to keep their brains working in top form.
I think I must have the long form of“period 3”.What about you?
小題1:The purpose of this passage might be________.
A.to tell us the importance of plenty of sleep
B.to tell the result of a research on sleepy gene
C.to inform the harm of lacking sleep
D.to announce the sleeping rules of humans
小題2:Which of the following decides how well you perform without sleep?
A.One short form.
B.One long copy.
C.One short and two long copies.
D.Period 3.
小題3:What kind of people need less sleep according to the research?
A.Those with two long copies of the gene.
B.Those with two short copies of the gene.
C.Those with one short and one long copy of the gene.
D.Those with three short copies of the gene.
小題4:If one lacks enough sleep,one should avoid doing important or dangerous things ________.
A.a(chǎn)t dawnB.a(chǎn)t night
C.in the afternoonD.a(chǎn)t noon

小題1:B
小題2:D
小題3:B
小題4:A

小題1:答案 B [主旨大意題。文章的目的就是介紹一項(xiàng)關(guān)于睡眠的實(shí)驗(yàn)結(jié)果(文章第三段為主題段)。]
小題2:答案 D [細(xì)節(jié)理解題。人們?nèi)狈λ邥r(shí)表現(xiàn)的好壞由“period 3”決定。根據(jù)第三段第一句話可知答案。]
小題3:答案 B [細(xì)節(jié)理解題。由文章第五段可得出答案。]
小題4:答案 A [推理判斷題。根據(jù)第五段第二句“In both groups,people performed worst in the early morning.”得出答案。缺乏睡眠的人在黎明時(shí)表現(xiàn)最差,因此不能在此時(shí)做重要或危險(xiǎn)的事情。]
練習(xí)冊系列答案
相關(guān)習(xí)題

科目:高中英語 來源:不詳 題型:閱讀理解

The Neutrality of American in the Early World War II
The establishment of the Third Reich influenced events in American history by starting a chain of events which culminated in war between Germany and the United States. The compete destruction of democracy, the persecution of Jews, the war on religion, the cruelty and barbarism of the Nazis, and especially the plans of Germany and her allies, Italy and Japan, for world conquest caused great indignation in this country and brought on fear of another world war. While speaking out against Hitler’s atrocities, the American people generally favored isolationist policies and neutrality. The Neutrality Acts of 1935 and 1936 prohibited trade with any belligerents or loans to them. In 1937 the President was empowered to declare an arms embargo in wars between nations at his discretion.
American opinion began to change somewhat after President Roosevelt’s “quarantine the aggressor” speech at Chicago (1937) in which he severely criticized Hitler’s policies. Germany’s seizure of Austria and the Munich Pact for the partition of Czechoslovakia (1938) also aroused the American people. The conquest of Czechoslovakia in March, 1939 was another rude awakening to the menace of the Third Reich. In August, 1939 came the shock of the Nazi-soviet Pact and in September the attack on Poland and the outbreak of European war. The United States attempted to maintain neutrality in spite of sympathy for the democracies arrayed against the Third Reich. The Neutrality Act of 1939 repealed the arms embargo and permitted “cash and carry” exports of arms to belligerent nations. A strong national defense program was begun. A draft act was passed (1940) to strengthen the military services. A Lend Act (1941) authorized the President to sell, exchange, or lend materials to any country deemed necessary by him for the defense of the United States. Help was given to Britain by exchanging certain overage destroyers for the right to establish American bases in British territory in the Western Hemisphere. In August, 1940 President Roosevelt and Prime Minister Churchill met and issued the Atlantic Charter which proclaimed the kind of a world which should be established after the war. In December, 1941, Japan launched the unprovoked attack on the United States at Pearl Harbor. Immediately thereafter, Germany declared war on the United States.
小題1:One item occurring before 1937 that the author does not mention in his list of actions that alienated the American public was
A the burning of the Reichstag.   B German plans for conquest.
C Nazi barbarism.             D the persecution of religious groups.
小題2:The Lend-Lease Act was designed to
A help the British.
B strengthen the national defense of the United States.
C promote the Atlantic Charter.
D avenge Pearl Harbor.
小題3:American Policy during the years 1935-1936 may be described as being
A watchful.  B isolationist.  C peaceful.   D indifferent.
小題4:The Neutrality Act of 1939
A permitted the selling of arms to belligerent nations.
B antagonized Japan.
C permitted the British to trade only with the Allies.
D led to Lend-Lease Act.
小題5:We entered the war against Germany
A because Germany declared war.
B because Japan was an ally of Germany.
C after Germany had signed the Nazi-soviet Pact.
D after peaceful efforts had failed.

查看答案和解析>>

科目:高中英語 來源:不詳 題型:閱讀理解

Greece declared a national state of emergency on Saturday as scores of forest fires that have killed at least 46 people continued to burn out of control, leaving some villages trapped within walls of flames, cut off from firefighters.
Although most of the fires have been on the Peloponnesian Peninsula, some broke out on the outskirts of Athens on Saturday, forcing the evacuation of homes and closing a major road linking the capital to the main airport for several hours. The national fire brigade said that by evening it had brought those blazes under control, including one that came within about six miles of the city.
The country has been vulnerable to fire this summer because of drought and three consecutive heat waves that sent temperatures soaring over 100 degrees. More than 3,000 forest fires have destroyed thousands of acres of wooded areas since June; the earlier fires killed nine people. The latest spate of fires on the peninsula started Friday. Strong, hot winds have spread the flames.
Firefighters expect the death toll to rise, because they have not yet been able to search some areas that had been overrun by flames.
Hardest hit by the fires were a dozen small villages t around the town of Zaharo in the western peninsula, where at least 12 people, including some who may have been trying to flee by car, were killed. Scores of other residents, including elderly and disabled people, remained trapped in their homes, phoning in to local television and radio stations, crying for help.
Late Saturday, Mr. Karamanlis, Prime Minister of Greece appeared on national television and declared that he was mobilizing all of the country’s resources to control the fire. Mr. Karamanlis also suggested that the recent fires might have been purposely set. “So many fires sparked simultaneously in so many regions is no coincidence,” he said, “We will get to the bottom of this and punish those responsible.”
The overstretched national fire services are being helped by an estimated 6,000 soldiers mobilized for the operation. A fleet of water-dumping aircraft was expected from France, Germany and Norway, after Greece appealed to the European Union for “urgent assistance.”
51.The writer mainly wants to tell us that ______ in the passage.
A. firefighters battles fearlessly in Greece to control the fire
B. constant fires in Greece have caused great life and wealth lose
C. Greece is facing great danger as forest fires continue to break out
D. Greek government is investigating the cause of recent forest fires
52. We can know from the passage that ______.
A. Athens, capital of Greece was not threatened in the fire
B. Greek government did not take effective measures to control the fire
C. many people had to leave their homes to avoid fire
D. all people endangered by the fire have already got immediate and proper help
53. According to the passage, which of the following might not contribute to the recent forest fires in Greek?
A. Storm thunders in summer
B. Lack of rainfall
C. Extremely hot weather this summer
D. Hot and strong wind
54. We can learn from the passage that ______.
A. now the fire crisis in Greece has come to an end
B. assistance from EU members is expected to come to help Greece
C. firefighters in Greece so far can still manage the situation
D. the number of people who die in the fire is expected not to rise any more
55. Mr. Karamanlis believes the forest fires in Greece _______.
A. is a happening by chance                             B. is a natural disaster
C. might be caused by human       on purpose             D. is a punishment of nature

查看答案和解析>>

科目:高中英語 來源:不詳 題型:閱讀理解

Some people in Manchester, Britain, will soon be paying for goods and services with so-called “smart” credit cards. These cards are more secure than the traditional magnetic-strip version and can be used to travel on buses, check bank accounts and do shopping.
The Manchester project is one of the biggest smart card schemes in the world. Every time people use the cards on a bus or train, the fare is deducted (reduced) from the value of the card. When they have no credit left, the cards can be recharged at a local shop.
A smart card looks just like a normal plastic card but it has a silicon chip in it. It is possible for the same silicon chip to perform a number of different functions, so one plastic card in your pocket could do a large number of different jobs. The card has much more memory space than a magnetic-strip card, so many more things can be recorded on it.There are two types of smart cards. One is the contact card which is used in the same way as a magnetic-strip card.
Information is transferred by running the card through a narrow opening in an electronic reader. In the slot, electronic probes make contact with the magnetic-strip or silicon ship and read the information. The other type is the contactless smart card where the electronic reader communicates with the card by short-range radio waves. This makes the card quicker and more convenient to use because it does not have to leave your wallet.  It is also more reliable as it is not easily influenced by scratches or dirt. However, the biggest advantage that smart cards have over magnetic-strip cards is that they are more secure. They are much more difficult to make than conventional cards and they have to be made by specially trained manufacturers. In addition, they have a large number of extra security features on them and if a smart card gets lost or stolen a quick phone-call to the distributor ensures that its individual number is made invalid and unreadable. This can be done more quickly than with a magnetic-strip card.
小題1:A smart credit card can do many kinds of jobs because ____ .
A.it is smartB.it is a plastic card
C.it has a silicon chip in itD.it can be recharged
小題2:“ The cards can be recharged” means that ____ .
A.the card can be put into a new charge of electricity
B.the cards can be changed into new ones
C.the cards can be put to use again
D.the cards can be recycled
小題3:What are the advantages of smart credit cards over traditional ones?
A.they can store more informationB.they are more secure
C.they are more convenient to useD.a(chǎn)ll of the above
小題4:Which of the following statements is TRUE according to the passage?
A.Contactless cards are more convenient to use than contact ones
B.Smart cards are more expensive to manufacturer
C.By means of long-range radio waves contactless cards can communicate with the electronic reader
D.A smart credit card and a normal plastic card are the same thing

查看答案和解析>>

科目:高中英語 來源:不詳 題型:閱讀理解

If you, a man, are looking through this, congratulations: you are a survivor (幸存者). According to a survey, you are more than twice likely to die of skin cancer than a woman, and nine times more likely to die of AIDS. If you make it to the end of your natural term, about 78 years for men in Australia, you will die on average five years before a woman.
There are many reasons for this. Men take more risks than woman and are more likely to drink and smoke—but perhaps more importantly, men don’t go to the doctor.
“Men aren’t seeing doctors as often as they should.” says Dr. Gullotta,“This is particularly so for the over 40s, when diseases tend to strike.”Gullotta says a healthy man should visit the doctor every year or two. For those over 45, it should be at least once a year. Two months ago Gullotta saw a 50-year-old man who had delayed(延遲) doing anything about his smoker’s cough for a year. “When I finally saw him it had already spread and he has since died from lung cancer.”he says.“Earlier finding and treatment may not have cured him, but it would have made him live longer.”
According to a recent survey, 95% of women aged between 15 and early 40s see a doctor once a year, compared to 70% of men in the same age group.
“A lot of men think they are strong enough. While some men are scared of what might be there and would rather not know. Most men get their cars serviced more regularly than they service their bodies.” Dr. Gullotta says. He believes most diseases that commonly affect men could be found out by check-ups. Regular check-ups for men would place strain on the public purse, Gullotta says. “But prevention is cheaper in the long run than having to cure the diseases. Besides, the final/highest cost is far greater: it is called premature death(過早死亡).”

小題1: From the first paragraph, we can know that _________.
A.women are more likely to die of skin cancer
B.men are more likely to get some deadly diseases
C.men can live five years longer than women
D.men who live long are very lucky
小題2:What is a more important reason for man’s death?
A.Men take more risks than women.
B.Diseases tend to strike men easily
C.Men don’t go to doctors for check-ups.
D.Men like drinking and smoking.
小題3:Why does the author take a 50-old-man as an example?
A.To realize the importance of disease prevention.
B.To show he could have avoided death.
C.To prove smoking leads to lung cancer.
D.To think highly of the doctor’s work.
小題4:What can be drawn from the last paragraph?
A.Treatment would cost a lot of money.
B.Cars are more valuable than health.
C.Men are brave to accept the reality.
D.Check-ups are necessary and worthwhile.

查看答案和解析>>

科目:高中英語 來源:不詳 題型:閱讀理解

The clock struck(敲)eleven at night. The whole house was quiet. Everyone was in bed except me. Under the strong light, I looked sadly before me at a huge pile of that troublesome stuff they call “books”. I was going to have my examination the next day. “When can I go to bed?” I asked myself. I didn’t answer. In fact I dared not(不敢).
The clock struck twelve. “Oh, dear!” I cried. “Ten more books to read before I can go to bed!” We students are the most wretched creatures in the world. Dad does not agree with me on this. He did not have to work so hard when he was a boy.
The clock struck one. I was quite desperate now. I forgot all I had learned. I was too tired to go on. I did the only thing I could. I prayed, “Oh God, please help me pass the exam tomorrow. I do promise to work hard afterwards, Amen.” My eyes were so heavy that I could hardly open them. A few minutes later, with my head on the desk, I fell asleep.
小題1: The underlined word “wretched” in Paragraph 3 probably means ____________.
A.happyB.disappointed
C.unhappyD.hopeful
小題2: Reviewing his lessons that night didn’t help him because ____________.
A.it was too late at night
B.he was very tired
C.his eyelids were so heavy that he couldn’t keep them open
D.he hadn’t studied hard before the examination
小題3: What do you suppose probably happened to the author the next day?
A.He went to a church to pray again.B.He passed the exam all by luck.
C.He failed in the exam.D.He was punished by his teacher.
小題4: The best title for the passage would be ____________.
A.The Night Before the ExaminationB.Working Far into the Night
C.A Slow StudentD.Going Over My Lessons

查看答案和解析>>

科目:高中英語 來源:不詳 題型:閱讀理解

Since the first Earth Day in 1970,American have gotten a lot “greenter” toward the environment . “We didn’t know at that time there even was an environment,let alone that there was a problem with it,”says Bruce Anderson,president of Earth Day USA.
But what began as nothing important in public affairs has grown into a social movement .Business people,political leaders, university professors,and especially millions of grass-roots Americans are taking part in the movement. “The understanding has increased many ,many times,”says Gaylord Nelson,the fromer govermor from Wisconsin,who thought up the first According to US government reports , emissions (排放)from cars and trucks have dropped from 10.3 million tons a year to 5.5 tons .The number of cities producing CO beyond the standard has been reduced from 40 to 9 .Although serious problems still remain and need to be dealt with , the world is a safer and healthier place .A kind of “Green thinking ” has become part of practices .
Great improvement has been achieved .In 1988 there were only 600 recycling programs ,; today in 1995 there are about 6,600 .Advanced lights ,motors , and building designs have helped save a lot of energy and therefore prevented pollution .
Twenty –five years ago , there were hardly any education programs for environment .Today , it’s hard to find a public school , university , or law school that does not have such a kind of program .” Until we do that , nothing else will change! ” say Bruce Anderson .
小題1:According to Anderson , before 1970, Americans had little idea about ___
A.the social movement
B.recycling techniques
C.environmental problems
D.the importance of Earth Day
小題2:Where does the support for environmental protection mainly come from?
A.The grass –roots level
B.The business circle
C.Government officials
D.University professors
小題3:What have Americans achieved in environmental protection ?
A.They have cut car emissions to the lowest
B.They have settled their environmental problems
C.They have lowered their CO levels in forty cities.
D.They have reduced pollution through effective measures .
小題4:What is especially important for environmental protection according to the last paragraph ?
A.Education
B.Planning
C.Green living
D.CO reduction

查看答案和解析>>

科目:高中英語 來源:不詳 題型:閱讀理解

A Simple Lesson
“Another bad day at school?” my father asked as I came into the room.
“How could you tell? I didn't shut the door heavily or anything,” I replied. Over the past two months I had either done this or thrown my backpack across the room every time I came home from school. Papa thinks it has something to do with moving to a new house.
“I know this move has been hard on you. Leaving your friends and cousins behind is tough,” Papa said, as he put his arm around my shoulder. “What you must remember is that, with a lot of hard work and some time, you will make new friends.”
“You don't know how hard it is. This year my baseball team would have won the championship. They won't even give me a chance to pitch (投球) here. All I get to play is right field, and that's the worst!”
Papa turned toward me. “Things will get better, I promise you. Let me ask you, do you know why you were named David Lorenzo?”
“Yes, your name is David and grandfather's name is Lorenzo.”
“Very good, and what makes your grandfather so important?”
“He was the first in the family to come to this country and all that,” I answered.
“That is only partly correct. Your grandfather was a very great man. In Mexico, he had been a teacher. When he came to America he could only get low­paid labor jobs because he didn't speak the language. It took him two years before he spoke English well enough to be allowed to teach here, but he did it. He never complained because he knew change could be difficult. Did he ever tell you that?” my father asked.
I looked down at my feet, ashamed at my behavior. “No. That must have been hard,” I said sheepishly.
“Your grandfather taught me that if you let people see your talent, they will accept you for who you are. I want you to always remember what my father taught me, even if it takes a few years for people to see who you are,” said Papa.
All I could say was, “Okay.” Then I asked, “What should I do now?”
Laughing, Papa said, “How about you pitch a few to me? You need some work.”
小題1:Why was the author unhappy that day?
A.Because he moved to a new country.
B.Because his baseball team lost the game.
C.Because he wasn't offered a chance to pitch.
D.Because he quarreled with his friends at school.
小題2:The father successfully changed his son's mood by ________.
A.a(chǎn)sking him to train harder
B.playing baseball with him
C.telling his grandfather's story
D.introducing him some new friends
小題3:The underlined word “sheepishly” probably means ________.
A.shyly        B.patiently
C.clumsilyD.cautiously
小題4:What can we infer about the author?
A.He thinks his father lives in the past.
B.He'd rather live with his grandfather.
C.He will continue to dislike school and everything.
D.He will try his best to adapt to the new environment.

查看答案和解析>>

科目:高中英語 來源:不詳 題型:閱讀理解


第二部分:閱讀理解(第一節(jié)20小題;第二節(jié)共5小題;每小題2分,滿分50分)
第一節(jié):閱讀下列短文,從每題所給的四個(gè)選項(xiàng)(A、B、C和D)中,選出最佳選項(xiàng)。
A
In 1921, Lewis Lawes became the warden (監(jiān)獄長) at Sing Sing Prison of New York State.No prison was tougher than Sing Sing during that time.But when Warden Lawes retired some 20 years later, that prison had become a humanitarian institution.Those who studied the system said credit for the change belonged to Lawes.But when he was asked about the transformation, here’s what he said, “I owe it all to my wonderful wife, Catherine, who is buried outside the prison walls.”
Catherine Lawes was a young mother with three small children when her husband became the warden.Everybody warned her from the beginning that she should never set foot inside the prison walls, but that didn’t stop Catherine!
When the first prison basketball game was held, she went into the gym with her three beautiful kids and she sat in the stands with the inmates.Her attitude was: “My husband and I are going to take care of these men and I believe they will take care of me! I don’t have to worry!” She insisted on getting acquainted with them and their records.She discovered one convicted murderer was blind so she paid him a visit.Holding his hand in hers she said, “Do you read Braille?” “What’s Braille?” he asked.Then she taught him how to read.Later, Catherine found a deaf-mute in prison.She went to school to learn how to use sign language.
Many said that Catherine Lawes was the body of Jesus that came alive again in Sing Sing from 1921to 1937.Then, she was killed in a car accident.The next morning Lewis Lawes didn’t come to work, so the acting warden took his place.It seemed almost instantly that the prison knew something was wrong.The following day, her body was resting in a casket in her home, three-quarters of a mile from the prison.As the acting warden took his early morning walk, he was shocked to see a large crowd of the toughest, hardest-looking criminals gathered like a herd of animals at the main gate.He came closer and noted tears of grief and sadness.He knew how much they loved Catherine.He turned and faced the men.
“All right, men, you can go.Just be sure and check in tonight!” Then he opened the gate and a parade of criminals walked, without a guard, the three-quarters of a mile to stand in line to pay their final respects to Catherine Lawes.And every one of them checked back in.Every one!
41.Catherine was not afraid of getting inside the prison walls because she believed ______.
A.one good turn deserves another      B.no pains, no gains
C.a(chǎn) new broom sweeps clean         D.virtue never grows old
42.The underlined word in paragraph three most probably refers to ______.
A.basketball players           B.prison guards
C.prisoners                 D.family of the prisoners
43.What made every one of the criminals check back in?
A.The acting warden’s requirement    B.The strict rules of the prison
C.Their respect for Catherine        D.The force of the guards
44.What is the best title of the passage?
A.A Tough Prison                            B.A Woman Bringing Changes
C.A warden Caring for Prisoners         D.A Great Wife

查看答案和解析>>

同步練習(xí)冊答案