If you want to slow aging, you might want to eat less. This finding is good news---if you were a mouse. The researchers studied mice, not people.
John Price and other researchers studied two groups of mice. One group was able to eat as much as it wanted. The researchers limited what the mice in the other group ate. Their diet had 35 percent fewer calories than the first group of mice.
Price says the mice with the diet restrictions were “more energetic and suffered fewer disease.” They were not just living longer but seemed to stay younger for a longer period of time.
The researchers found that fewer calories slow down a natural mechanism in cells called ribosomes. Price explains that ribosomes are responsible for making important proteins in the cells. But with fewer calories, they slow down. This gives the cells more time to repair themselves.
The researchers say ribosomes use from 10 to 20 percent of the cell’s energy to make those proteins. Price wrote that “because of this, it is impractical to destroy an entire ribosome” when it starts to break down. However, “repairing individual parts of the ribosome on a regular basis enables ribosomes to continue producing high quality proteins for longer than they would otherwise. This top quality production, in turn, keeps cells and the entire body functioning well.”
Price said, “ribosome is a very complex machine, like a car.” They need “maintenance to replace the parts that wear out the fastest. When tires wear out,” he explained, “you don’t throw the whole car away and buy a new one. It costs less to replace the old tires.”
“Food,” he said, “isn’t just material to be burned---it’s a signal that tells our body and cells how to respond.” Price said the findings help to explain how exactly our bodies age. And this may “help us make more educated decisions about what we eat.”
1.What can we know about the mice with limited calories from the study?
A. They can keep healthy easily
B. They need more energy to be active
C. They can look younger than they are
D. They will live a longer life like humans
2.What will happen to ribosomes if there are fewer calories?
A. They will completely break down
B. They make proteins in the cells slowly
C. They will produce high quality proteins more
D. They may need more time to repair themselves
3.Price explained the ribosomes’ role of repairing themselves by _________.
A. telling a story
B. listing basic data
C. making comparisons
D. experimenting on mice
4.What does the text mainly deal with?
A. Food decides how long you live
B. Can you slow down your aging process?
C. Eating less may help you live longer
D. Should your diet be reduced for your health?
高三英语阅读理解困难题
If you want to slow aging, you might want to eat less. This finding is good news---if you were a mouse. The researchers studied mice, not people.
John Price and other researchers studied two groups of mice. One group was able to eat as much as it wanted. The researchers limited what the mice in the other group ate. Their diet had 35 percent fewer calories than the first group of mice.
Price says the mice with the diet restrictions were “more energetic and suffered fewer disease.” They were not just living longer but seemed to stay younger for a longer period of time.
The researchers found that fewer calories slow down a natural mechanism in cells called ribosomes. Price explains that ribosomes are responsible for making important proteins in the cells. But with fewer calories, they slow down. This gives the cells more time to repair themselves.
The researchers say ribosomes use from 10 to 20 percent of the cell’s energy to make those proteins. Price wrote that “because of this, it is impractical to destroy an entire ribosome” when it starts to break down. However, “repairing individual parts of the ribosome on a regular basis enables ribosomes to continue producing high quality proteins for longer than they would otherwise. This top quality production, in turn, keeps cells and the entire body functioning well.”
Price said, “ribosome is a very complex machine, like a car.” They need “maintenance to replace the parts that wear out the fastest. When tires wear out,” he explained, “you don’t throw the whole car away and buy a new one. It costs less to replace the old tires.”
“Food,” he said, “isn’t just material to be burned---it’s a signal that tells our body and cells how to respond.” Price said the findings help to explain how exactly our bodies age. And this may “help us make more educated decisions about what we eat.”
1.What can we know about the mice with limited calories from the study?
A. They can keep healthy easily
B. They need more energy to be active
C. They can look younger than they are
D. They will live a longer life like humans
2.What will happen to ribosomes if there are fewer calories?
A. They will completely break down
B. They make proteins in the cells slowly
C. They will produce high quality proteins more
D. They may need more time to repair themselves
3.Price explained the ribosomes’ role of repairing themselves by _________.
A. telling a story
B. listing basic data
C. making comparisons
D. experimenting on mice
4.What does the text mainly deal with?
A. Food decides how long you live
B. Can you slow down your aging process?
C. Eating less may help you live longer
D. Should your diet be reduced for your health?
高三英语阅读理解困难题查看答案及解析
Eat less food _______ you want to put on weight .
| A．if | B．unless | C．until | D．as soon as |
高三英语单项填空简单题查看答案及解析
Researchers in the United States say eating less can slow the aging process of cells in the body. The researchers studied mice, not people.
1. One group was able to eat as much as it wanted. The other animals in the other group were limited to eat. Their diet had 35 percent fewer calories than the first group of mice.
The mice with the diet restrictions (限制) were more energetic and suffered fewer diseases. They were not just living longer, they seemed to stay younger for a longer period of time. When you restrict calories (in mice), there is a direct increase in lifespan—the average age of the animal.2.
But how? The researchers found that fewer calories slow down a natural mechanism in cells called ribosomes (核糖体). Ribosomes are responsible for making important proteins in the cells. But with fewer calories, they slow down.3. This, in turn, keeps cells and the entire body functioning well.
Earlier studies have suggested a link between calorie restrictions and slowed aging.4.
Calorie restriction as a way to slow aging has not been tested in humans. But the main finding for people is the importance of taking care of our bodies.5. And this may help us make better decisions about what we eat.
A. The less we eat, the healthier we are.
B. Researchers studied two groups of mice.C. This finding is good news if you are a mouse.
D. This gives the cells more time to repair themselves.
E. The findings help to explain how exactly our bodies age.
F. However, this is first to show how the ribosomes can influence aging.
G. Calorie restriction caused real biochemical changes that slowed down the rate of aging.
高三英语七选五中等难度题查看答案及解析
If you want to try out some unique and strange hotels, the following might be interesting to you.
Dog Bark Park Inn
Located in Cottonwood, Idaho, this hotel is actually in the shape of a dog. Every detail inside displays the love of dogs.The room sleeps 4 and contains a full bath, a microwave, air conditioning, books, games, but no television or telephone. You will feel the rural atmosphere more vividly without outdoor influences. Since this hotel is extremely popular with visitors, you should book in advance.
Palacio de sal Hotel
This hotel is located at the eastern shore of the Great Salar de Uyuni, near the world’s biggest salt flat. Since the building and some furniture are made entirely of salt, there are some specific rules the guests should follow. For example, visitors are banned from licking(舔)the walls and they also should be careful with salt furniture. Typically, the Bolivians treat their guests to salty meat.
Das Park Hotel
Das Park Hotel, located in Linz, Austria, is actually a number of drainpipes(排水管)that have been turned into rooms. It’s one of the greatest example of how people can reuse materials. Since the space of each room is about 2 square meters, there are only a bed, light, power and ventilation(通风设备). You should pay for the bathroom and kitchen equipment. It uses a wonderful sound-proofing material to protect from being disturbed by the outer noise. The hotel is only available from May to October.
V8 Hotel
Are you a car lover? The V8 Hotel in Meilenwerk, Germany may be your cup of tea. Both design and architecture are about automobiles, which will surely create the racing mood! Each room has an automotive theme as well. You can sleep in a bed made from a white Mercedes or sleep in the workshop room where your car bed is actually lifted up on jacks.
Moreover, the V8 Hotel isn’t located in somewhere; it is located in a special and unique area—the Motorworld Stuttgard. Car specialists, enthusiasts, people who love technology and technical aesthetics(审美学)can find everything here.
1.Which hotel should be reserved to live in?
A. Dog Bark Park Inn. B. Palacio de sal Hotel.
C. Das Park Hotel. D. V8 Hotel.
2.What is forbidden in the Palacio de sal Hotel?
A. Eating salty meat. B. Licking the walls.
C. Lying on a salt bed. D. Taking a bath with salt.
3.What can we infer about Das Park Hotel?
A. Each room is large enough to hold two beds.
B. The sound of the pipes is the main disturbance.
C. People can cook there if they pay extra money.
D. The hotel can be available throughout the year.
4.Who may like V8 Hotel best?
A. Statue artists. B. Construction workers.
C. Art collectors. D. Car enthusiasts.
高三英语阅读理解中等难度题查看答案及解析
Ways to Worry Less
Do you want to worry less? Of course you do,fight? That's like me asking if I could send you free bacon.Worry is like black mold—it appears in damp conditions and spreads uncontrollably.And often times we don't realize it's there until it's killing us.We must get rid of worry before it destroys us.But how?1.
Do what you need to do.
2.You ought not to avoid tough projects or hard conversions until the last moment.If you don't do what you should be doing,you will end up spending the rest of the time worried about the must-to-do things.Believe it or not, the anxiety that comes from worrying is much worse than the task we're worried about.
3.
I think many of us act like we're puppets（木偶）in a play and we're waiting for something or someone to put us in the right place.You just react to whatever is going on.4.We need to live on purpose.Nothing can cause worry like purposelessness.
Make plans.
You can't have intentionality without making plans.Making plan will enable you to achieve your aims more smoothly.Yet,don't place your plans in stone.You can adjust your plans flexibly.Accept changes.5.
There are other ways to lessen worry.As long as you are determined to take action,you will live a worry-free life.
A.Worry ruins creativity.
B.Get more intentional.
C.Do what you should be doing.
D.We need to stop letting life just happen.
E.Make new plans and then move forward.
F.You do the same as people around you do.
G.Here are some effective ways to deal with it.
高三英语七选五中等难度题查看答案及解析
Ways to Worry Less
Do you want to worry less? Of course you do, fight? That's like me asking if I could send you free bacon. Worry is like black mold—it appears in damp conditions and spreads uncontrollably. And often times we don't realize it's there until it's killing us. We must get rid of worry before it destroys us. But how?1.
Do what you need to do.
2.You ought not to avoid tough projects or hard conversions until the last moment. If you don't do what you should be doing, you will end up spending the rest of the time worried about the must-to-do things. Believe it or not, the anxiety that comes from worrying is much worse than the task we're worried about.
3.
I think many of us act like we're puppets（木偶）in a play and we're waiting for something or someone to put us in the right place. You just react to whatever is going on.4.We need to live on purpose. Nothing can cause worry like purposelessness.
Make plans.
You can't have intentionality without making plans. Making plan will enable you to achieve your aims more smoothly. Yet, don't place your plans in stone. You can adjust your plans flexibly. Accept changes.5.
There are other ways to lessen worry. As long as you are determined to take action, you will live a worry-free life.
A. Worry ruins creativity.
B. Get more intentional.
C. Do what you should be doing.
D. We need to stop letting life just happen.
E. Make new plans and then move forward.
F. You do the same as people around you do.
G. Here are some effective ways to deal with it.
高三英语七选五中等难度题查看答案及解析
Do you want to live forever? By the year 2050, you might actually get your wish — if you are willing to leave your biological body and live in silicon circuits （半导体电路）．But long before then, perhaps as early as 2020, some measures will begin offering a semblance of immortality （虚拟的永生）.
Researchers are confident that technology will soon be able to track every waking moment of your life. Whatever you see and hear, all that you say and write, can be recorded, analyzed and added to your personal chronicles （履历）. By the year 2030, it may be possible to catch your nervous systems through electrical activities, which would also keep your thoughts and emotions.
Researchers at the laboratories of British Telecommunications have given the name of this idea as Soul Catcher. Small electronic equipment will make preparation for Soul Catcher. It would use a wearable supercomputer, perhaps in a wristwatch, with wireless links to micro sensors under your scalp（头皮） and in the nerves that carry all five sensory signals. So wearing a video camera would no longer be required.
At first, the Soul Catcher's companion system — the Soul Reader — might have trouble copying your thoughts in complete details. Even in 2030, we may still be struggling to understand how the brain is working inside, so reading your thoughts and understanding your emotions might not be possible. But these signals could be kept for the day when they can be transferred to silicon circuits to revitalize minds everlasting entities （永生实体）. Researchers can only wonder what it will be like to wake up one day and find yourself alive inside a machine．
For people who choose not to live in silicon, semblance of immortality would not be as useless as they thought. People would know their lives would not be forgotten, but would be kept a record of the human race forever. And future generations would have a much fuller understanding of the past. History would not be controlled by just the rich and powerful, Hollywood stars, and a few thinkers in the upper society.
1.The main idea of this passage is that _______．
A．human beings long for living forever
B．there are many difficulties in making the Soul Catcher
C．people might live forever as technology develops
D．the invention of Soul Catcher has great importance
2.According to this passage, a Soul Catcher will be ______．
A．a new machine on which research measures have already been made
B．a new invention in order to catch and keep human's thoughts and emotions
C．made by British scientists to offer something that looks like living forever
D．made of silicon circuits which can catch people's nervous activity
3.According to the writer, semblance of immortality is ______．
A．to be a reality sooner or later B．far from certain
C．just an idea that couldn't t be realized at all D．a fading hope
4.The meaning of the underlined word "revitalize" in the fourth paragraph is close to________.
A．make dead B．make famous C．make known D．make active
高三英语阅读理解中等难度题查看答案及解析
If you want to know how crazy people can be about their pets, you might remember that Helmsley left $12 million to her little Maltese dog when she died last year.
The dog's name is Trouble. And apparendy Trouble is still alive. Of course, I would hang on,too, if someone left me $12 million. Look! Top-shelf dog food, soft pillows everywhere, drivers walking me in nice leafy parks. I would live to be 110 in dog years.
The dog's story is still fresh in my mind the other night when I leave a steak house after a superb meal. Then I notice a woman carrying a small bag out of the door behind me.
Once outside, she walks over to where a man is holding a tiny dog hke it's a baby. The dog looks like a Maltese, too, barking and annoying, with a cute haircut,
And now I am treated to an absolute astonishing sight. Because now the woman reaches into the bag and begins pulling out little pieces of meat, which she puts on a plastic spoon and feeds to the dog.
This is no cheap steak house. It's actually, way out of my league --I'm there only because it's a special occasion. I can tell you this: if I walked out of the place with any leftover steak, it sure wouldn't go to a dog. Not at those prices.
So now the woman is Spoon-feeding the dog and the man is just standing there, holding this dog and looking as if this is the most normal thing in the world. And the dog is calmly chewing these pieces of steak as if he's a little king. And this dog is in no hurry. He's having a great time.
A few minutes go by, and now the dog finishes all of his steak. At this point, I hear the woman say to the man "Think he's still hungry?" And she glances behind her at the restaurant, as if she might go back in there to get more steak for the dog.
Watching all this, I'm afraid I'm going to shout, "Are you out of your mind? Feeding all that pricey steak to that little dog? Did you see what our American life is like today? We're all going to be eating dog food if this keeps up!"
1.Why would the author live to be 110 in dog years?
A．Because he is always in poor health and falls ill.
B．Because a Maltese dog lives longer than a human being.
C．Because his grandparents left him a large sum of money.
D．Because he thinks the dog is treated extremely well.
2.What is the story mainly about?
A．An American family's happy life.
B．A Maltese dog getting $12 million from its owner.
C．A New Yorker spending $ 8 billion for a few banks.
D．A pet dog being fed with expensive food.
3.The underlined sentence "It's actually way out of my league. " (in Para. 6) means __
A．the restaurant is too expensive for the author
B．the author hates the dog being taken there
C．the superb restaurant is about to be out of service
D．the dog doesn't belong to the author's group
4.Seeing the dog.is being treated to expensive steak, the author becomes extremely ____
A．indifferent B．annoyed C．concerned D．envious
高三英语阅读理解中等难度题查看答案及解析
If you want to be on the school football team, you ________ train harder.
A．can B．would C．might D．must
高三英语单项填空中等难度题查看答案及解析
If you sit down to play an old-school board game like chess this holiday season, it might be surprising to keep in mind just how bad you'd be against a computer. In fact, computers have shown they're capable of taking humans' lunch money at board games for a while now. Remember Deep Blue versus Gary Kasparov in 1997 or AlphaGo against Lee Sedol, in South Korea, at the game of Go(围棋), in 2016?The computer won.
Now, the same team that created the Go-playing robot is celebrating something more powerful: an artificial intelligence system that is capable of teaching itself and winning at three different games.
They call it AlphaZero, and it knows two kinds of chess and Go. All of these games fall into the kind of “full information” or “perfect information” contests-each player can see the entire board and has access to the same information. That's different from games like poker, for example, where you don't know what cards an opponent is holding.
“AlphaZero needs to be told the rules of the games first, and after that, it learns by competing with itself in the games,” says Julian Schrittwieser."It suggests that we have a good chance to extend this to even more real-world problems that we might want to solve later."
And board games have historically been a good way to test computers' abilities. “It took us decades of work on these games to reach the point where AlphaZero can perform them better than people,” Campbell says. “I think they've served the field very well. They've allowed us to explore techniques such as the ones used in AlphaZero, which will be helpful as the field aims at more complex tasks.” Campbell adds. “And that is the whole point in the first place of solving games-it isn't for their own sake, but for it is a limited kind of environment where we can make progress in many other branches of science and technology.”
1.What's the author's main purpose in mentioning the two games in paragraph 1?
A.To show computers are bad at playing board games,
B.To prove computers can defeat humans at board games.
C.To emphasize humans are capable of playing computer games.
D.To demonstrate people can earn money by playing board games.
2.What is paragraph 3 mainly about?
A.The operating principle of AlphaZero. B.The differences between chess and Go.
C.The information about hi-tech contests. D.The features of the games AlphaZero knows.
3.How can AlphaZero learn in the games?
A.By playing the games against itself. B.By playing multiple online games.
C.By being programmed by humans. D.By setting the rules of the games.
4.What does Campbell say about board games?
A.They help solve computers' problems.
B.They are used to test people's abilities.
C.Their techniques can be applied to other fields.
D.Their technology can be merely limited in games.
高三英语阅读理解中等难度题查看答案及解析