This time of year many of us are determined t...

This time of year many of us are determined to get back into shape. But if you are having trouble fitting into your tight jeans, it may not be your fault. Scientists now believe that willpower alone is not enough to lose weight. They say success depends on your genes, hormones (荷尔蒙) and psychology.

A study of 75 people by BBC Science and Oxford and Cambridge Universities has looked into why one-size-fits-all diets are often not successful. The scientists divided over-eaters into three groups—people who feast, people who constantly crave food and emotional eaters. They tailored (定制) diets to the needs of each group.

Feasters can’t stop eating once they start. This is because they don’t have the hormones that tell them when they are full. Scientists designed a diet for this group paying special attention to high protein foods that make them feel full for a long time. This included fish, chicken, basmati rice and grains. Bread and potatoes were not allowed because they do not fill you up for long.

Constant cravers always feel hungry. Scientists say that certain genes stop the messages the stomach sends to the brain saying it is full, meaning the cravers always feel like they need more fatty, sugary food. Dieting seven days a week is very hard for these people, so scientists put them on a normal, healthy diet five days a week, and eating whenever they feel stressed. To help them change this behaviour, scientists offered them group support in meetings and online as well as a diet.

During the study, people from all three groups lost weight on the tailored diets, with feasters losing the most and constant cravers losing the least.

So what about you? If any of the eating habits sound familiar, perhaps you should consider a new approach to slimming for now.

1.What is the solution that scientists suggest for feasters?

A.Providing them with a certain hormone.

B.Designing a high-protein diet for them.

C.Reducing their calorie intake on the weekend.

D.Giving them group support in meetings and online.

2.It can be inferred from the passage that______.

A.Bread and potatoes are harder to digest than fish and chicken.

B.Anyone can lose weight only if he or she has strong determination.

C.Emotional eaters are more likely to lose weight than constant cravers.

D.Scientists will find one-size-fits-all diets for those who want to lose weight.

3.The passage is mainly about______.

A.Three factors that determine our success in getting back into shape.

B.Three approaches to losing weight according to eating habits.

C.Willpower is not enough to lose weight.

D.A research on tailored diets.

高三英语阅读选择困难题查看答案及解析

There are still many problems ahead of us, but by this time next year we can see light at the end of the ________.

A. battle        　　 B. day        C. road        D. tunnel

高三英语单项填空简单题查看答案及解析

There are still many problem ahead of us, but by this time next year we can see light at the end of the ________.

A. battle                 B. day                   C. road               D. tunnel

高三英语单项填空中等难度题查看答案及解析

Right now in the Pacific Northwest， the local Lummi tribe is reminding us of our connection to nature， pushing us to question how we treat other species and demanding the release of a captive killer whale from Miami Seaquarium． Many local cultures have known for thousands of years that the success and sustainability of society depend upon our relationship to the natural environment　 have tried at great lengths to share this knowledge with us． And it's about time that we listened．

As a conservation biologist， my job is to conduct research that helps protect Earth's biodiversity． From my scientific perspective， I back the Lummi's call to release Lolita back into her native waters． Unlike other captive killer whales that were born at amusement parks， Lolita was taken directly from her native environment， which luckily has remained． This means that the likelihood of a successful reintroduction is quite high．

Why？ First， because Lolita already knows how to hunt from her younger years in the Salish Sea before she was taken． Proponents of keeping killer whales captive often say that the whales are not equipped with the skills to know how to hunt and survive in the wild． This is not the case for Lolita．

Second， the fact that Lolita's family still exists and that her mother is still alive means the chances of her being accepted back into the family are quite high． In addition to their 80-year lifespans， killer whales have also been shown to long-term memories． That makes it very likely that Lolita's family will remember her and welcome her back． The fact that Lolita's mother is still alive is particularly exciting because killer whale families are matriarchal， meaning that the female members of the families largely shape the group's social structure．

From my conservationist perspective， I also back the call to free Lolita． Her family belongs to a group known as "southern resident killer whale，" an endangered species whose populations are not doing well． By bringing Lolita home to the Salish Sea， we are effectively adding one more re-productively mature female into the population． If Lolita reproduces， her offspring will help maintain the wild population of wild resident killer whales．

From an ethical perspective， I support the release of Lolita because it is the right thing to do． We know that killer whales are intelligent， and that they are highly social creatures， parallel to Primates （灵长类） and yes， humans too． What does it mean for us as a society that we allow the captivity of intelligent marine mammals for our own amusement？ If we cannot begin to value the diversity of life on this planet， how are we going to be able to value the diversity of life within the human race？

The release of Lolita would be a victory for the Lummi， for science-based conservation and for repairing the relationships between humans and other species． As Martin Luther King Jr． once put it， One day the ridiculousness of the almost universal human belief in the slavery of other animals will be apparent． We shall then have discovered our souls and become worthier of sharing this planet with them．

1.What does NOT contribute to the successful reintroduction of Lolita？

A.The native living environment of Lolita has remained．

B.Lolita learned the survival skills at Miami Seaquarium．

C.Killer whales have long lifespans and long-term memories．

D.Lolita's mother is still alive and plays a decisive role in the family．

2.What can be inferred if Lolita is released？

A.The ecological balance of Pacific Ocean will be disturbed．

B.The population of the endangered species may stop decreasing．

C.People will value the diversity of life within the human race．

D.The Lummi tribe may gain enormous economic benefits．

3.Which of the following shows the development of ideas in the passage？

I： Introduction　　　　　　　　 P： Point　　　　　　 Sp： Sub-point （次要点）　　　　 C： Conclusion

A. B. C. D.

4.What's the main purpose of this passage？

A.To call on Seaquariums to stop using animals for entertainment．

B.To introduce the local Lummi culture to the world．

C.To support the proposal to free Lolita the killer whale．

D.To encourage people to live in harmony with animals．

高三英语阅读选择困难题查看答案及解析

Why elephants rarely get cancer is a mystery that has confused scientists for decades. A study was led by researchers at Huntsman Cancer Institute (HCI) at the University of Utah and Arizona State University, including researchers from the Ringling Bros. Center for Elephant Conservation may have found the answer. According to the results, elephants have 38 additional modified copies of a gene (基因) that encodes p53, a well-defined tumor (肿瘤) suppressor, as compared to humans, who have only two. Further, elephants may have a more powerful mechanism for killing damaged cells that are at risk for becoming cancerous. In isolated elephant cells, this activity is doubled compared to healthy human cells, and five times that of cells from patients with Li-Fraumeni Syndrome, who have only one working copy of p53 and more than a 90 percent lifetime cancer risk in children and adults. The results suggest extra p53 could explain elephants’ increased resistance to cancer.

“Nature has already figured out how to prevent cancer. It’s up to us to learn how different animals overcome the problem so we can adapt those strategies to prevent cancer in people,” says co-senior author Joshua Schiffman, M.D., pediatric oncologist (肿瘤学家) at Huntsman Cancer Institute, University of Utah School of Medicine, and Primary Children’s Hospital.

According to Schiffman, elephants have long been considered a walking problem. Because they have 100 times as many cells as people, they should be 100 times more likely to have a cell slip into a cancerous state and cause the disease over their long life span of 50 to 70 years. And yet it’s believed that elephants get cancer less often, a theory confirmed in this study. Analysis of a large database of elephant deaths estimates a cancer death rate of less than 5 percent compared to 11 to 25 percent in people.

1.Why do humans often get cancer compared to elephants according to the passage?

A.Elephants are bigger than humans.

B.Elephants have more p53 than humans.

C.Elephants are not as clever as humans.

D.Elephants eat more than humans.

2.Which of the following is right according to the passage?

A.Some damaged cells may be dangerous.

B.Some damaged cells are not dangerous.

C.Some damaged cells can’t be cancerous.

D.Some damaged cells in elephants’ bodies are more dangerous than those in humans’ bodies.

3.What can we know from the last paragraph?

A.Elephants have more cells than people. B.Elephants can get cancer easily.

C.Elephants seldom die from cancer. D.Elephants often die from cancer.

4.Which of the following can be the best title for the passage?

A.Elephants help us B.Learn from Nature

C.How to deal with cancer D.Nature helps us prevent cancer

高三英语阅读选择中等难度题查看答案及解析

There were far fewer cars on the streets and crowds were not seen in the shopping malls in Central China's Wuhan on Jan. 24—the Eve of the Chinese New Year. The scene was quite different from the occasion in the previous years because of the novel coronavirus, which had resulted in 41 deaths in China by the end of New Year's Eve. Mostly in Wuhan, according to the National Health Commission.

Chen Li, a doctor in a Wuhan hospital, spent the Chinese Lunar New Year's Eve at home to quarantine herself for having had contact with infected patients, but luckily she has no signs of symptoms for the time being. Chen's husband is at the forefront of the fight against the epidemic. “We haven't seen each other for over a week," said Chen. On Saturday morning, she put on protective clothing again and returned to work.

Wuhan is following Beijing's SARS treatment model in 2003 to build a makeshift hospital with 1,000 beds for receiving infected patients. It will be completed and put into use prior to Feb. 3, less than 10 days away. "It's going to be another all-nighter. We need to speed up the work said Lyu Jun, a young truck driver at the construction site. This is his first Spring Festival away from home.

For ordinary people, this year's Lunar New Year’s Eve lacks some gatherings. Yin Yeqiong. from Hunan Province, refunded her tickets back home after much debate. “I had it in my mind to still go home, but finally decided to stay in Wuhan," she said. “Our stay will help reduce panic in other places.

Doctors, nurses and experts from across the nation have been selected to join the battle, and manufacturers have restarted their plants to produce medical consumables that have been running short in many places.

“This is going to be an unforgettable Spring Festival," said Chen Ying, a writer. "Because I feel that at this moment, there are so many families that I do not know, in every corner of this city, praying for our home.”

1.What does the underlined word "quarantine" mean in Paragraph 2?

A.Support. B.Recover. C.Examine. D.Separate.

2.Why did Yin Yeqiong decide to stay in Wuhan?

A.She couldn't afford the ticket back home.

B.She was eager to work as a volunteer.

C.She didn't want to cause unnecessary trouble.

D.She was not allowed to go back to her home.

3.What can we learn from the text?

A.The Spring Festival in China this year is the same as before.

B.Chen Li and her husband are fighting against the novel coronavirus in Wuhan.

C.Lyu Jun and his coworkers will help complete the hospital in Beijing.

D.There is no need to worry because we have plenty of medical consumables.

4.What does the text intend to tell us?

A.The Chinese are fighting against the epidemic together.

B.The epidemic is not so serious that we can enjoy our normal life.

C.Coronavirus, a highly infectious disease. is spreading around China.

D.Not until the makeshift hospital is completed will the doctors find the cure.

高三英语阅读选择中等难度题查看答案及解析

Global warming happens when greenhouse gases trap heat and light from the sun in the earth’s atmosphere, which increases the temperature. This is like when heat is trapped in a car. On a hot day, the car gets hotter when it is out in the parking lot. This is because the heat and light from the sun can get into the car, by going through the windows，but it can’t get back out. This is what the greenhouse effect does to the earth .The heat and light can get through the atmosphere, but it can’t get out .As a result, the temperature rises.

Sometimes the temperature can change in a way that helps us. The greenhouse effect makes the earth appropriate for people to live on. Without it, the earth would be freezing, or it would be burning hot. It would be freezing at night because we would not get the sun’s heat and light. During the day, especially during the summer, it would be burning because the sun would be up with no atmosphere to filter(过滤) it, so people, plants, and animals would be exposed to all the light and heat.

Although the greenhouse effect makes the earth able to have people living on it, if there gets to be too many gases, the each can get unusually warmer, and many plants, animals and people will die. Plants would die because they would not be able to take the heat .This would cause us to have less food to eat, and it would also limit the food that animals have. With less food for the animals that we need to survive we would even have less food. Gradually, people, plants, and animals would all die of hunger.

People are doing many things to try to stop global warming. One thing is carpooling-driving with someone to a place that you are both going to. Another thing is being more careful about leaving electrical devices turned on. Now, more people are even riding buses or bikes to lower the amount of greenhouse gases in the air .Although adults do many things to help stop global warming, kids call do just as much.

1.By the example given in Paragraph l, the author wants to__________.

A.explain how global warming happens

B.show his feeling in a car in hot summer

C.tell us cars are causes of greenhouse gases

D.say that I there are greenhouse gases in every car

2.The underlined word “it” in Paragraph 2 refers to__________.

A.light B.greenhouse effect

C.temperature D.heat

3.What is the effect of atmosphere?

A.IT only traps the heat of the sun.

B.It does great harm to humans.

C.It makes the earth neither to hot nor too cold.

D.It prevents all the light from the sun shining on the earth.

4.What is the main idea of the third paragraph?

A.lf there is greenhouse effect all the plants will die

B.Human beings are likely to disappear from the earth

C.Crops can’t take in the heat lf there is greenhouse effect

D.Although greenhouse effect is necessary. Too much of it will cause us to die.

高三英语阅读选择中等难度题查看答案及解析

请认真阅读下面短文，并根据所读内容在文章后表格中的空格里填入一个最恰当的单词。

注意：每个空格只填一个单词。

Imagine living in a country torn by war. Or maybe you live in a place where there are few jobs and little chance to earn a living. Your family decides to move — not to another town, but to another country. You and your family have become immigrants. People are called immigrants when they move to a foreign country to make their homes.

People become immigrants for many reasons. The most common one is economic opportunities. Most immigrants are attracted to other countries by the promise of jobs, farmland, or business opportunities.

Other people become immigrants in order to get away from mistreatment or natural disasters. They are refugees (难民). Some refugees move to avoid wars and political unrest. Others are seeking freedom to express their religious views. Still others are uprooted by disasters, such as terrible flooding or drought.

Some people have become immigrants against their will. Captured in Africa, shipped to foreign lands and forced to work as slaves, many early African immigrants to North and South America came in chains.

Except for Native Americans, all people came to the United States from someplace else. For nearly 500 years, immigrants have landed on America’s shores seeking a better life. Throughout American history, immigrants often worked low-paying, dangerous jobs that other people refused to do.

Immigrants from around the world helped shape American life. Many immigrants absorbed the customs and language common to most Americans. They also brought their own traditions, including music and foods. Over time, many of these traditions have become part of American life.

The first European immigrants to America hoped to colonize (使成为殖民地) new lands. By the mid-1500s, Spaniards had ventured into Florida, California, and the American Southwest. French immigrants arrived in the early 1600s and built their first colony in Canada. The English also arrived in the early 1600s. They established 13 colonies along America’s Atlantic Coast.

In the 1700s, England became the major power in colonial North America. But many European immigrants came to live in the English colonies. They included people from Sweden, Holland, Germany, Scotland, and Ireland.

Immigrants still come to the United States seeking freedom and economic opportunities. Most new immigrants no longer come from Europe. They come mainly from Central and South America, the Caribbean, and Asia.

Today, the U. S. government limits the number of immigrants into the country each year. People who sneak illegally into the United States are called illegal immigrants, who, if caught, would be sent back to their home countries.

高三英语任务型阅读中等难度题查看答案及解析

Work Smarter Not Harder

In Dan Pink’s Free Agent Nation: The Future of Working for Yourself, he closes the book with a long, excellent list of “Work Smarter Not Harder” type advice for people who want to start working for themselves.

1.Below are my favorites.

●Make a “not to” list. Prepare a list that contains all the things you shouldn’t waste your time on useless tasks, unnecessary meetings, worthless phone calls, and so on. 2.

●Carry a notebook and pen. Thomas Edison did it. Virginia Woolf did it. And so did Charles Darwin. They carried a notebook with them everywhere and wrote down ideas that popped into their heads. 3.Trust me: This is a fantastic way to explore ideas and to weave creativity into the fabric of your life.

● 4. Ask questions. Take smart people to lunch. Read. Read some more. Listen to audiobooks. Take classes. Added benefit: This makes life more interesting. Yet another benefit: Studies have shown that people who make constant learning part of their lives end up living longer.

●Guard your calendar. Make sure your time is focused on your one or two top priorities (优先). Ask yourself: “Is this how I want to be spending my time right now?” Remember: You are your calendar. 5.

●Respond to calls and e-mails quickly. Even if your response is,“I’ll get back to you,” try to get back to people within 24 hours. They’ll appreciate the politeness.

A.Be quick, but don’t hurry.

B.So treat your calendar with respect.

C.Become a learning machine.

D.Page through the notebook occasionally.

E.Try to begin your day the same way.

F.Then place it next to your “to do” list and stick to it.

G.Frankly, the list is so good I think everyone would benefit from it.

高三英语七选五中等难度题查看答案及解析

Mountains of smoke and fire

Deep under the Earth’s surface, it’s so hot that even rock melts. Sometimes this molten rock, called “magma”, is pushed up to the surface.1.And the opening or vent that lets the lava out is a volcano.

A volcano may explode violently, throwing out rocks for miles around.2.Some volcanoes release clouds of poisonous gas or huge clouds of ash. Volcanoes can even do all these things underwater.

Most volcanoes have been around for a very long time. Many haven’t erupted for years and have cooled off. Volcanoes that are not going to erupt again are called “dead volcanoes”. Some volcanoes still give off smoke. These “sleeping volcanoes” may “wake up” one day and erupt again. 3. But one day in AD 79 it suddenly woke up. Its eruption threw out hot ash and rocky fragments (碎片) that buried the city of Pompeii. A hot mud-flow buried nearby Herculaneum. Because the remains are so well preserved, the area has been named a World Heritage site.

But not all volcanoes are destructive. When a volcano throws out vast amounts of lava and debris (岩屑), it piles up into a mountain.4.

Other volcanoes help provide heat and energy. Many Icelandic homes get their hot water from springs heated by volcanic steam.5. Plants grow very well in the rich soil left by volcanoes. And valuable gems, such as diamonds, can sometimes be found in the rocks that are thrown out by volcanoes.

A.At this point it is referred to as “lava”.

B.The molten rock is formed inside the Earth.

C.This steam can also be used to produce electricity.

D.Mount Vesuvius in Italy slept for a thousand years.

E.Or it may push lava out so that it flows away, cools and hardens.

F.Japan has many active volcanoes within its narrow national territory.

G.The Hawaiian Islands and the island of Iceland were created in this way.

高三英语七选五困难题查看答案及解析