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IT'S a mystery that has puzzled scientists. Five years ago, researchers found an area in the Atlantic Ocean seabed, where a part of the Earth's outer layer, or crust（地壳）, is missing. A thick layer of dark green rock, which is usually found deep inside the planet, lies exposed.
The crust, mantle(地幔) and core（地核） are the main layers that make up the planet. The mantle rests between the crust and the core.
Last month, a team of 12 British scientists set off on a six-week trip to study the hole in the crust.
The hole is about 4,800 meters below sea level and is believed to be more than 48,000 meters long and more than 48,000 meters wide. Scientists think that there are other nearby gaps. "It is like a window into the interior (内部) of the Earth," says scientist Bramley Murton, who is part of the research team.
The site where the hole is located is part of a ridge (山脉) of undersea volcanoes. There, two of the plates that make up the Earth's surface meet. The plates are always moving. When the plates move away from each other, lava rushes up from the mantle to fill the gap and form a new crust. But this did not happen in the area where the hole is located.
The hole is giving researchers a good opportunity to study what's below the Earth's surface. The team will use a special robotic tool to film the area and get samples of the exposed mantle. They hope to study everything from the chemistry of the oceans to how the Earth's surface behaves under the sea.
1. What's the title for the passage?
A. How to study the earth.
B. The formation of the earth.
C. A hole in the earth.
D. Studying the inside of the earth.
2.For the main layers of the earth, which one is right?
A. crust, mantle, core B. seabed, crust, mantle
C. seabed, mantle, core D. crust, seabed, core
3.How does the hole come into being?
A. It's because of a volcano eruption.
B. It's because of the plates movements
C. It's because lava rushes up from the mantle
D. It's not clear from the passage.
4.By studying the hole, the scientists want to do the following except____.
A. knowing what's below the Earth's surface
B. getting samples of the exposed mantle
C. getting the film of the hole
D. studying the chemistry of the oceans
高二英语阅读理解中等难度题查看答案及解析
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The predictability of our death rates is something that has long puzzled social scientists. After all, there is no natural reason why 2,500 people should accidentally shoot themselves each year
or why 7,000 should drown or 55,000 die in their cars. No one establishes a quota (定额) for each type of death. It just happens that they follow a consist
ent pattern year after year.A few years ago a Canadian psychologist named Gerald Wilde became interested in this phenomenon. He noticed that mortality rates for violent and accidental deaths throughout
the Western world have remained strangely static throughout the whole of the century, despite all the technological advances and increases in safety standards that have happened in that time. Wilde developed an interesting theory called “risk homeostasis”. According to this theory, people naturally live with a certain level of risk. When something is made safer, people will get around the measure in some way to get back to the original level of danger. If, for instance, they are required to wear seat belts, they will feel safer and thus will drive a little faster and a little more recklessly, thereby statistically canceling out the benefits that the seat belt offers. Other studies have shown that where a crossing is made safer, the accident rate invariably falls there but rises elsewhere along the same stretch of road as if making up for the drop. It appears, then, that we have an inborn need for danger. In all events, it is becoming clearer and clearer to scientists that the factors influencing our lifespan are far more subtle and complex than had been previously thought. It now appears that if you wish to live a long life, it isn’t simply a matter of paying attention to certain precautions such as eating the right foods, not smoking, and driving with care. You must also have the right attitude. Scientists at the Duke University Medical Center made a 15-year study of 500 persons personalities and found, somewhat to their surprise, that people with a suspicious or mistrustful nature die prematurely far more often than people with a sunny disposition. Looking on the bright side, it seems, can add years to your life span.1.What social scientists have long felt puzzled about is why __________.
A. the death rate can not be predicted
B.the death toll remained stable year after year
C.a quota for each type of death has not come into being
D.people lost their lives every year for this or that reason
2.In his research, Gerald Wilde finds that technological advances and increases in safety standards __________.
A.have helped solve the problem of so high death rate
B.have oddly accounted for death rates in the past century
C. have reduced death rates for violent and accidental deaths
D. have achieved no effect in bringing down the number of deaths
3.According to the theory of “risk homeostasis”, some traffic accidents result from ___________.
A. our
inborn desire for riskB. our fast and reckless driving
C. our ignorance of seat belt benefits
D. our instinctive interest in speeding
4.By saying “statistically canceling out the benefits that the seat belt offers” (Para. 2), the author means __________.
A. wearing seat belts does not have any benefits from the statistic point of view
B. deaths from wearing seat belts are the same as those from not wearing them
C. deaths from other reasons counterbalance the benefits of wearing seat belts
D. wearing seat belts does not necessarily reduce d
eaths from traffic accidents5.Which of the following may contribute to a longer life span?
A. Showing adequate trust instead of suspicion of others
B. Eating the food low in fat and driving with great care
C. Cultivating an optimistic personality and never losing heart
D. Looking on the bright side and developing a balanced level of risk
高二英语阅读理解中等难度题查看答案及解析
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It is a question that has long puzzled scientists—exactly why are tigers orange? One might think it makes them more obvious-particularly against a leafy green forest background. William Blake summed it up in his famous poem known by generations of schoolchildren: “Tyger, tyger, burning bright / In the forest of the night.” But now the answer is at hand.
While obvious to us, computer simulations (模拟) of what the big cats look to the main animals they hunt for, deer, show a different picture. Humans with normal colour vision, can see red, blue and green colours. But deer can only pick up blue and green light, they are effectively colourblind to the colour red, like some humans. It means the tigers’ orange colouration looks green to them, allowing them to mix perfectly into the background, new research claims.
Dr John Fennell at the University of Bristol and colleagues said that they used computers to estimate how noticeable a given animal was. They did this by using images of the environment in which the animal lives, and then creating images to see whether the camouflage helps the animal to mix in.
Dr Fennell writes that by simulating what the world looks like to animals who are “two-colour vision”—someone who cannot discover the difference between red and green—“we also identify the most suitable colours for hiding and visibility”.
Dr Fennell writes in the Royal Society Journal Inter face: “Considering the coat of a tiger, it has fur that appears orange to a three-colour vision observer rather than some shade of green, though the latter should be more appropriate color for an attack hunter in forests. However, when viewed as a two-colour vision observer, the tiger’s colour is very effective.”
The question then arises as to why tigers don’t grow green coats. Dr Fennell and colleagues write that mammals (哺乳动物) are not able to produce green fur. To do so would “require a significant change to mammalian biochemistry”. There is only one mammal known to have green fur but this is achieved through what might be considered as, well, cheating, not exactly real.
1.Why does the author mention the poem in paragraph 1?
A.To arouse reader s interest in poems.
B.To show the authors respect to the poet.
C.To answer the question of the color of the tiger
D.To stress the noticeable color of the tiger to us.
2.What color is inexistent in the eyes of deer?
A.Black. B.Red.
C.Blue. D.Green.
3.What does the underlined word “camouflage” mean in paragraph 3?
A.The cover of something.
B.The images of something.
C.The way of hiding something.
D.The way of hunting for something.
4.What can be inferred from the last paragraph?
A.The colour of tigers sometimes cheats people.
B.Getting green may prevent tigers from being extinct.
C.There are no mammals with real green fur in the world.
D.The tigers’ fur will probably evolve into green in the future.
高二英语阅读理解中等难度题查看答案及解析
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He graduated from a medical research ______ five years ago and has been working as a doctor since then.
A. data B. attendance
C. context D. institute
高二英语单项填空简单题查看答案及解析
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Five thousand years ago, people thought that illnesses were the result of evil living in human bodies. They also believed that gods and superior spirits were punishing people through diseases. The practice of magic and witchcraft (巫术) was popular among many tribes, and charms (符咒) and images of gods to drive away the evil spirits were often used.
People also started using herbal(草药的) medicine and by trial and error (反复试验，不断摸索) learned how to cure stomachaches and fevers. They had a witch doctor in the community. He would treat people with simple herbal medicine and magic. Early medicine was practiced the way north tribal Indians did hundreds of years ago and the way some tribes practice it today.
The ancient Chinese believed that the body was ruled by two forces, which they called “yin” and “yang”. The body would become ill if one force overcame the other and the balance between them was changed. Acupuncture (针刺疗法) was the way to bring back the balance between the two.
Also sand painting was an important part of Navaho medicine. The medicine man paints loosely upon the floor of an earth-covered house, where the ceremony takes place, or on a buckskin (鹿皮) or a piece of cloth, by letting the colored sands flow through his fingers with control and skill.
Ancient Mesopotamians believed that diseases come either from an evil spirit or a physical problem, such as worms. The doctor would decide from which source the illness has come from and send the patient either to a herbalist or to a witch doctor.
Egyptians had a very advanced medicine. They would sometimes rely on the god’s power to receive healing, but they also treated illnesses and operated on minor health problems like snake bites. They sucked the blood from the wound and bound the affected limb to stop the poison from spreading.
66. The practice of magic and witchcraft was popular in ancient times because ________ .
A. people could avoid being punished by gods and superior spirits by doing this.
B. people thought they could avoid getting diseases in this way.
C. people believed the evil spirits could be driven away in this way.
D. people often got diseases and this way was very effective.
67. How many places are mentioned where early medicine existed in the passage?
A. Three. B. Four. C. Five. D. Six.
68. From Paragraph 2 we can learn that ________.
A. people can cure lots of diseases by combining herbal medicine and magic.
B. herbal medicine is so effective that it can cure all kinds of diseases.
C. witch doctors treated people only with herbal medicine.
D. people tried lots of times to cure illnesses with herbal medicine.
69. Ancient Chinese people believed that ________.
A. diseases were the result of evil living in human bodies.
B. people would fall ill if the balance in human bodies was disturbed.
C. a medicine man could cure people’s diseases by sand painting.
D. diseases not only came from evil spirits but also were physical problems
70. The passage mainly tells us ________.
A. why ancient people became ill.
B. about the most advanced medicine in ancient times.
C. about the development of herbal medicine.
D. how ancient people cured their diseases.
高二英语阅读理解简单题查看答案及解析
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I experienced great bitterness five years ago. At that time, my father _______ from an accident. As the eldest son, I had no _______ but to drop out of school and work in a factory. I didn't dare to ask for more, just hoping to _______ my two younger brothers. However, that's not a(n) _______ thing, for I couldn't afford to _______ their tuition(学费)even if I worked from day to night. Without my father's protection, I _______ I was only a slave to the life.
Later on, something changed my life. I still remember that it was a _______ day. I walked slowly in the _______. Suddenly the rain stopped. I _______ my head and found that "the sky" was in fact an umbrella. Then I heard a deep ________. "Why not ________ without an umbrella? "a one-leg man with a walking stick said to me. "If you run, you would get less wet.” His words ________ me deeply. He told me he once had dreamed of being a policeman, but an incident ruined his ________ Later he became a promoter(促销). Though his work was demanding and didn't suit for his ________, he still thought every outing was a wonderful start to him. He stated that he felt ________ he didn't lose his ________ and still "ran" on the road of life.
Inspired by his words, I became an insurance agent. After two years' ________, I did well and my family turned better ________. I got the time to return to my senior school, and eventually succeeded in my entrance to ________.
Everything is so simple:to run without an umbrella! When you run out of the rainy season of your life, there will be a ________ sky ahead of you!
1.A.died B.survived C.suffered D.recovered
2.A.possibility B.chance C.choice D.success
3.A.get on with B.give up C.separate from D.bring up
4.A.difficult B.awful C.easy D.wonderful
5.A.pay B.avoid C.lend D.calculate
6.A.imagined B.observed C.explained D.realized
7.A.sunny B.rainy C.windy D.cold
8.A.shop B.room C.street D.school
9.A.nodded B.raised C.shook D.buried
10.A.sound B.voice C.noise D.song
11.A.run B.jump C.fly D.dig
12.A.pleased B.embarrassed C.frightened D.astonished
13.A.fantasy B.job C.family D.dream
14.A.eye B.leg C.hand D.ear
15.A.delighted B.annoyed C.disappointed D.sad
16.A.achievement B.failure C.money D.courage
17.A.struggle B.rest C.relaxation D.hesitation
18.A.completely B.immediately C.gradually D.partly
19.A.participation B.university C.competition D.society
20.A.colorful B.strange C.grey D.bright
高二英语完形填空中等难度题查看答案及解析
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Dusty is a golden hunting dog that joined my family five years ago. She’s a great dog, but the dog hair drives me_______sometimes. It’s on my clothes, it’s on the furniture, and it _______in little piles in the corner of every room. It’s _______!
We now have the little sticky, roll tool, which is used to _______ the hair before we leave the house. It is especially _______ for the kids as they insist on giving Dusty a big _______ before going to school every morning.
My elder son, Hayden, is 10 and a half, and my twins Madison and Logan turn 8 in November this year. In the past couple of months, I have _______ been able to enjoy few nights’ complete _______. That’s over ten years’ deprivation(剥夺) of my rest time! However, _______ I always pay attention to my toil(辛劳), I can quickly become a(n)________ woman who is too bored and upset to enjoy life properly. Without the help of my husband, having 3 young kids and a pet to ________ in the house is surely not a(n)________ task. However, if I remember to ________ the positives that they bring to my life instead of the ________ and the cost of private schooling for the kids, I can feel my job is full of happiness. Indeed, our smart pet and healthily-growing children have given me lots of ________.
In spite of the troubles in life, what we focus on ________ our feelings. Our families, our jobs, our communities and so on, each ________ some annoying elements that can rob us of our ________. So our ________ is to stop wasting time considering the annoyances and ________ to be grateful for the positives.
1.A.busy B.crazy C.funny D.calm
2.A.grows B.comes C.gathers D.disappears
3.A.everywhere B.somewhere C.nowhere D.elsewhere
4.A.throw up B.clean up C.burn out D.put up
5.A.important B.interesting C.comfortable D.annoying
6.A.hug B.smile C.praise D.nod
7.A.only B.yet C.always D.even
8.A.imagination B.sleep C.music D.work
9.A.before B.so C.if D.although
10.A.peaceful B.anxious C.kind-hearted D.generous
11.A.educate B.put C.raise D.accompany
12.A.meaningful B.reasonable C.bored D.easy
13.A.put out B.deal with C.make up D.focus on
14.A.emotions B.events C.troubles D.appearances
15.A.creativity B.freedom C.ability D.pleasure
16.A.catches B.stops C.shapes D.forbids
17.A.costs B.reaches C.returns D.contains
18.A.joy B.excitement C.sorrow D.surprise
19.A.fact B.challenge C.reason D.theory
20.A.remember B.ignore C.refuse D.hope
高二英语完形填空中等难度题查看答案及解析
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Much to the couple’s comfort, their income is now double ______ it was five years ago.
A. that B. than C. which D. what
高二英语单项填空简单题查看答案及解析
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—Where did you meet the visitor?
—It was in the school _____I worked five years ago.
A．where
B．that
C．which
D．what
高二英语单项填空简单题查看答案及解析
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Much to the couple’s comfort, their income is now double ________ it was five years ago.
A. that B. than C. which D. what
高二英语单项填空中等难度题查看答案及解析
or why 7,000 should drown or 55,000 die in their cars. No one establishes a quota (定额) for each type of death. It just happens that they follow a consist
ent pattern year after year.
the Western world have remained strangely static throughout the whole of the century, despite all the technological advances and increases in safety standards that have happened in that time. Wilde developed an interesting theory called “risk homeostasis”. According to this theory, people naturally live with a certain level of risk. When something is made safer, people will get around the measure in some way to get back to the original level of danger. If, for instance, they are required to wear seat belts, they will feel safer and thus will drive a little faster and a little more recklessly, thereby statistically canceling out the benefits that the seat belt offers. Other studies have shown that where a crossing is made safer, the accident rate invariably falls there but rises elsewhere along the same stretch of road as if making up for the drop. It appears, then, that we have an inborn need for danger. In all events, it is becoming clearer and clearer to scientists that the factors influencing our lifespan are far more subtle and complex than had been previously thought. It now appears that if you wish to live a long life, it isn’t simply a matter of paying attention to certain precautions such as eating the right foods, not smoking, and driving with care. You must also have the right attitude. Scientists at the Duke University Medical Center made a 15-year study of 500 persons personalities and found, somewhat to their surprise, that people with a suspicious or mistrustful nature die prematurely far more often than people with a sunny disposition. Looking on the bright side, it seems, can add years to your life span.