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How long can human beings live? Most scientists who study old age think that the human body is ___ to live no longer than 120 years. However, 110 years is probably the longest that anyone could hope to live — if he or she is ___ healthy and lucky. Some scientists even say we can live as long as 130 years! Yet, our cells simply cannot continue to reproduce ___. They wear out, and as a result, we get old and ___ die.
Even though we can’t live forever, we are living a ___ life than ever before. In 1900, the average American life span(寿命)was only 47 years, but today it is 75 years!
When does old age begin then? Sixty-five may be out-of-date as the ___ line between middle age and old age. After all, many older people don’t begin to experience physical and mental ___ until after age 75.
People are living longer because more people ___ childhood. Before modern medicine changed the laws of nature, many children died of common childhood ___. Now that the chances of dying ____ are much lower, the chances of living long are much higher due to better diets and health care.
On the whole, our population is getting older. The ____ in our population will have lasting effects on our social development and our way of life. Some people fear such changes will be for the worse, while some see ____, not disaster. Today, many men and women in their "golden years" are healthy, still active, and young in ____ if not in age.
As our society grows old, we need the ____ of our older citizens. With long lives ahead of them, they need to ____ active and be devoted.
1.A. designed B. selected C. improved D. discovered
2.A. completely B. generally C. apparently D. extremely
3.A. rapidly B. harmlessly C. endlessly D. separately
4.A. eventually B. hopelessly C. automatically D. desperately
5.A. busier B. longer C. richer D. happier
6.A. finishing B. guiding C. waiting D. dividing
7.A. stress B. damage C. decline D. failure
8.A. survive B. enjoy C. remember D. value
9.A. problems B. fears C. worries D. diseases
10.A. poor B. young C. sick D. quiet
11.A. changes B. recovery C. safety D. increases
12.A. dreams B. chances C. strengths D. choices
13.A. mind B. appearance C. voice D. movement
14.A. protection B. suggestions C. contributions D. permission
15.A. sound B. appear C. turn D. stay
高三英语完形填空中等难度题查看答案及解析
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How long can human beings live? Most scientists who study old age think that the human body is ______ to live no longer than 120 years. However, 110 years is probably the longest that anyone could hope to live —— if he or she is ______ healthy and lucky. Some scientists even say we can live as long as 130 years! Yet, our cells simply cannot continue to reproduce ______. They wear out, and as a result, we get old and ______ die.
Even though we can’t live forever, we are living a ______ life than ever before. In 1900, the average American life span (寿命) was only 47 years, but today it is 75 years!
When does old age begin then? Sixty-five may be out-of-date as the ______ line between middle age and old age. After all, many older people don’t begin to experience physical and mental ______ until after age 75.
People are living longer because more people ______ childhood. Before modern medicine changed the laws of nature, many children died of common childhood ______. Now that the chances of dying ______ are much lower, the chances of living long are much higher due to better diets and health care.
On the whole, our population is getting older. The ______ in our population will have lasting effects on our social development and our way of life. Some people fear such changes will be for the worse, while some see ______, not disaster, many men and women in their “golden years” are healthy, still active, and young in ______ if not in age.
As the society grows old, we need the ______ of our older citizens. With long lives ahead of them, they need to ______ active and devoted.
1.A. designed B. selected C. improved D. discovered
2.A. completelyB. generallyC. apparently D. extremely
3.A. rapidlyB. harmlessly C. endlessly D. separately
4.A. eventually B. hopelessly C. automatically D. desperately
5.A. busier B. longer C. richer D. happier
6.A. finishingB. guiding C. waiting D. dividing
7.A. stressB. damage C. decline D. failure
8.A. survive B. enjoy C. remember D. value
9.A. problems B. fears C. worries D. diseases
10.A. poorB. young C. sick D. quiet
11.A. changes B. recovery C. safety D. increases
12.A. dreams B. chances C. strengths D. choices
13.A. mind B. appearance C. voice D. movement
14.A. protection B. suggestions C. contributions D. permission
15.A. sound B. appear C. turn D. stay
高三英语完形填空中等难度题查看答案及解析
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Scientists study ____ human brains work to make computers.
A. when B. how C. that D. whether
高三英语单项填空中等难度题查看答案及解析
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(2012·四川)Scientists study ________ human brains work to make computers.
A．when B．how C．that D．whether
高三英语单项填空中等难度题查看答案及解析
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Edmund Halley was an English scientist who lived over 200 years ago. He studied the observations of comets (彗星) which other scientists had made. The orbit（轨道）of one particular comet was a very difficult mathematical problem. He could not figure it out. Neither could other scientists who dealt with such problems.
However, Halley had a friend named Isaac Newton, who was a brilliant mathematician. Newton thought he had already worked out that problem, but he could not find the papers on which he had done it. He told Halley that the orbit of a comet had the shape of an ellipse(椭圆形).
Now Halley set to work. He figured out(解决，计算出)the orbits of some of the comets that had been observed by scientists. He made a surprising discovery. The comets that had appeared in the years 1531, 1607, and 1682 all had the same orbit. Yet their appearance had been 75 to 76 years apart.
This seemed very strange to Halley. Three different comets followed the same orbit. The more Halley thought about it, the more he thought that there had not been three different comets as people thought. He decided that they had simply seen the same comet three times. The comet had gone away and had come back again.
It was an astonishing idea! Halley felt certain to make a prediction(预言)of what would happen in the future. He decided that this would appear in the year 1758. There were 53 years to go before Halley’s prediction could be tested. In 1758 the comet appeared in the sky. Halley did not see it, for he had died some years before. Ever since then that comet had been called Halley’s comet, in his honor.
1.Edmund Halley figured out the orbit of ____.
A. some different comets appearing several times
B. the same comet appearing at different times
C. three different comets appearing at the same time
D. several comets appearing at the same time
2.Halley made his discovery ____.
A. by doing experiments
B. by means of his own careful observation
C. by using the working of other scientists
D. by chance
3.Halley made a surprising, but correct prediction in the year____.
A. 1704 B. 1705 C. 1706 D. 1707
4.This passage in general is about ____.
A. Halley and other scientists B. the orbit of a comet
C. Newton and Halley D. Halley and his discovery
高三英语阅读理解简单题查看答案及解析
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Scientists have been studying how people use money for long. Now they’re finding some theories may apply to one group of monkeys.
Researchers recently taught six monkeys how to use money. They gave the monkeys small metal disks(圆片) that could be used like cash and showed them some yummy apple pieces. The monkeys soon figured out that if they gave one of the disks to a scientist, they d receive a piece of apple in return.
If you think that is all the monkeys can figure out, you are wrong. Two researchers, Jake and Allison, acted as apple sellers in the experiments. The monkeys were tested one at a time and had 12 disks to spend in each experiment. Jake always showed the monkeys one apple piece, while Allison always showed two pieces. But that’s not necessarily what they gave the monkeys. The number of apple pieces given for a disk was determined at random.
Experiment One: Allison showed two pieces of apples but gave both pieces only half the time. The other half, she took one piece away and gave the monkey just the remaining piece. Jake, on the other hand, always gave exactly what he showed: one piece for each disk. The monkeys chose to trade more with Allison.
Experiment Two: Allison continued to sometimes gave two pieces and sometimes one piece. But now, half the time, Jake gave the one apple piece he was showing, and half the time he added a bonus. Guess what? The monkeys chose to trade more with Jake.
In the first experiment, the monkeys correctly figured out that if they traded with Allison, they’d end up with more treats. In the second one, when a monkey received two pieces from Jake, it seemed like again. When Allison gave the monkey only one piece instead of the two she showed, it seemed like a loss. The monkeys preferred trading with Jake because they’d rather take a chance of seeming to win than seeming to lose.
We also sometimes make silly business decisions just to avoid the feeling that we’re getting less, even when were not. Would you have made the same choices?
1.What conclusion might experts draw from the first experiment?
A. The monkeys show certain business sense.
B. Business theories can apply to all monkeys.
C. People are smarter in terms of finance.
D. It’s easy to teach monkeys how to trade.
2.What does a bonus in paragraph 5 refer to?
A. A metal disk.
B. An apple piece.
C. A chance.
D. A coin.
3.Why did the monkeys choose to trade more with Jake in the second experiment?
A. Because Jake always gave them two apple pieces.
B. Because the apple pieces from Jake were yummy.
C. Because they didn’t like the feeling of losing.
D. Because they get more apple pieces from Jake.
4.What could be the best title for the passage?
A. People’s Business Decision: Lose or Gain?
B. Moneky’s Business Sense: Smart or Silly?
C. Shopping for Bargain: Same or different?
D. Disk for Apple: Who to Trade with?
高三英语阅读理解中等难度题查看答案及解析
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Scientists who study the Sun watch for sunspots—violent storms that can affect communications，navigation systems and even electric power stations on the Earth.
Sunspots are a product of huge electromagnetic storms on the Sun. Scientists on the Earth are able to observe sunspots eight minutes after they happen. That is how long it takes for the Sun’s light to reach us.
The first electrically charged particles (颗粒）from a sunspot enter the Earth’s atmosphere about 20 to 30 minutes after the storm happens. These particles can harm human beings. So before they arrive, astronauts on the International Space Station move into special areas designed to protect them from their effects.
About a day or two later, the biggest part of the storm arrives. It is called a coronal mass ejection. “That is billions of tons of solar material that's blown away from the Sun. It’s traveling millions of kilometers an hour, but that is relatively slow.” says Alex Young, the Associate Director for Science at NASA's Heliophysics Science Division.
Several civilian government agencies and the U.S. Air Force watch weather conditions in space 24 hours a day. NASA does so because it must protect its astronauts and the electronic devices on its spacecraft.
Scientists are also trying to understand why the number of sunspots rises and falls at almost regular intervals every 11 years. In other words, scientists can almost predict the amount of solar activity. Sometimes the intensity (强度）is higher，sometimes lower，For example, the current solar cycle, as it is called, is much lower than the previous one.
Several satellites watch the Sun and the environment between the Sun and tho Earth. Pictures and other information from the satellites tell scientists what is happening on and near the Sun.
Alex Young says we have only been looking at the Sun with powerful instruments for about 30 to 40 years. Thai is a very short time compared to ll\o four billion years that tho star has been shining.
1.Why do astronauts on International Space Station move into special area?
A.To avoid being harmed. B.To charge the battery.
C.To watch the Sun closely D.To protect devices on the spacecraft.
2.How long does a solar cycle last?
A.About 8 minutes. B.About 20 to 30 minutes
C.About 11 years. D.About 30 to 40 minutes
3.What enables scientists to watch the Sun?
A.Environmental changes. B.Good weather conditions
C.Advanced instruments. D.Government agencies
4.What does the passage mainly talk about?
A.The role of satellites. B.findings about sunpots
C.Observation of space. D.Communication on the earth.
高三英语阅读理解简单题查看答案及解析
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According to some scientist , every human being, _____, gives off body heat.
A．what he is doing B．however he is doing
C．whatever is he doing D．no matter what he is doing
高三英语单项填空困难题查看答案及解析
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Scientists say they have found key clues（线索）into how long we will live. One of them is a firm __21___. British researchers believe a firm strong handshake is not just a __22___ of confidence but also an indicator of a long life. Lead author Dr Rachel Cooper of University College London said her study looked __23___ 33 different reports on the __24___ of handshakes. The research involved more than 50,000 men and women and __25___ 40 years. Dr Cooper concluded that __26___ with weaker handshakes were 70 per cent more likely to die earlier than those with the __27___ handshakes. She concludes that people with a firm strong handshake __28___ from a happy childhood that __29___ a healthy diet and __30___ of exercise.
The new study, __31___ in the British Medical Journal, also found other signs of living a longer life. These 'measures of __32___ capability' include walking at a faster pace, getting out of a chair quickly, and being able to __33___ on one leg. The study showed that slow walkers were almost three times __34___ to die at a younger age than those who walked quickly and actively. Those who __35___ to get up from their armchairs were twice as likely to die earlier than those who sprang __36___ their chairs. Dr Cooper believes there __37___ more research into the link __38___ physical capability and a long life. “Research that helps people to __39___ a long and healthy life is ever more important to help provide for an ageing __40___.” she said.
1.A．childhood B. relationship C．hardship D．handshake
2.A．sign B. symbol C．trip D．sigh
3.A．at B. into C．to D．on
4.A．strength B. length C．likeliness D．confidence
5.A．last B. past C．lasted D．passed
6.A．women B. they C．those D．men
7.A．weaker B. strongest C．weakest D．strong
8.A. must benefit B.could have lived C. should come D. may have benefited
9.A．concluded B. consisted C．included D．including
10.A．plentiful B. plenty C．a number D．the number
11.A．published B. being published C．publishing D．having published12.A．physician B. physics C．physiology D．physical
13.A．stand B. balance C．live D．shake
14.A．likely B. likelier C．likelihood D．liking
15.A．wanted B. hoped C．struggled D．were dying
16.A．out of B. in front of C．ahead of D．away from
17.A．needs to be B. need to be C．ought to be D．must be
18.A．from B. among C．between D．beneath
19.A．benefit B. involve C．make D．enjoy
20.A．popularity B. pollution C．population D．publication
高三英语完型填空简单题查看答案及解析
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A long time ago, before human beings lived on the earth, little coral polyps（水螅）settled around tropical （热带的）coastlines and constructed corals. Over a long period they created lots of reefs. Yet, pollution, climate change and commercial fisheries are limiting the chance of future generations knowing or seeing many of the reefs and sea creatures that exist. Hence, take action to dive now and you can explore the underwater world.
Commercial underwater diving began in ancient Greece. Diving in general means that the whole body is completely in water. On that account there are lots of exciting and quite adventurous ways to dive, like shark cage diving, scuba diving（戴水肺潜水）and reef diving.
There are great coral reefs all over the world, but usually they are situated in warm, clear water such as the Pacific and the Indian Ocean, where they grow best. This is why there are no coral reefs on the west coast of South Africa. However, South Africa’s east coast offers much brightly coloured sea life.
In South Africa more than 100,000 dives a year are made just in coral reefs, which are one of the natural wonders of the world. To see the whole beauty of the reef the right diving gear（设备） is an essential requirement. This means a perfect fitting diving mask and fins, as well as a snorkel（呼吸管）and a friend. Diving alone is dangerous because there may be strong currents you are not aware of, and it’s a lot more fun to share the experience with someone. However, before you can explore the deeper sea, a certificated and checked scuba, a wetsuit and of course a license will be needed. Whether you choose the snorkel or the scuba to spot the colourful underwater world, try to touch as little as possible, be careful with the corals and don’t strike the fishes, because the complex ecosystem is very sensitive.
1.The following factors probably affect coral reefs EXCEPT ________.
A．sea creatures B．pollution C．fishing D．climate change
2.Which of the following is true according to the passage?
A．Human beings appeared before corals were created.
B．One needs a license to dive into the deeper sea.
C．Diving alone has many advantages.
D．The origin of diving is in modern Greece.
3.There are no coral reefs on the west coast of South Africa probably because of a lack of ________.
A．large waters and soft sand
B．warm currents and delicious food
C．friendly creatures and flat seabed
D．clear water and suitable temperature
4.The last paragraph mainly tells us ________.
A．diving alone under the sea is rather dangerous
B．some matters we need pay attention to when diving
C．South Africa is a popular place for diving
D．what we should wear when diving
高三英语阅读理解中等难度题查看答案及解析