Slow down at the crossing. It’s dangerous to ...

Slow down at the crossing. It’s dangerous to run ________ the red traffic light.

A.across B.through C.along D.against

高一英语单项填空中等难度题查看答案及解析

Nowadays golf is a very popular game around the world and the golf course is usually Perfectly taken care of by the owners. When a golfer plays on any golf course, he or she expects the course has a lot of hazards（障碍区）like sands, woods, and ponds of water. There is one special golf course, though, where along with these hazards that stand still, the player must expect to compete against hundreds of moving hazards. The golf course is on Christmas Island. The island is an area of Australia in the Indian Ocean, the third largest ocean in the world, lying between Africa and Australia. The moving hazards are bright red, four-and-one-half-inch crabs, small creatures with five pairs of legs, carrying a shell.

Over 150 million of these brightly colored crabs live in the island’s rainforests. Every year, starting around November, the crabs migrate（迁徙）, that is, they leave the rainforest and make their way to the ocean. They arrive at the coast after one to three weeks. But the males return to the rainforest earlier than the females, who return about half a month later after producing up to 100,000 eggs.

On Christmas Island there is a golf course which was built on the crabs, migration route. During the migration season, there are hundreds of red crabs moving on the course. The rules of the Christmas Island Golf Club say that all players must treat the crabs as they would treat any other hazard. They cannot move them, and they must play around them. If a walking crab happens to knock a ball while it is on the green, hitting it into a hole, the ball is considered “in”.

The golfers must compete against a moving hazard, and actually so must the crabs. People have built roads that run through the crabs’ migration route. Unluckily, up to two million crabs are killed by passing vehicles every year. People are trying to reduce the number by putting up “Crab Crossing’’ signs and closing certain roads during the migration season.

1.What do we learn about the red crabs according to paragraph two?

A.They arrive in the rainforest in November.

B.They spend most of their year in the ocean.

C.The females spend two more weeks on the coast.

D.The males start to migrate earlier than the females.

2.The rules of the Christmas Island Golf Club 　　　 .

A.can help protect the crabs

B.will attract more golf players

C.slow down the migration of the crabs

D.are designed to help improve the Golf skills

3.By saying “The golfers must... so must the crabs”, the author means 　　　 .

A.the crabs must face danger on the road

B.the crabs are quite perfect moving hazards

C.the crabs like competing against moving hazards as well

D.the crabs should choose the right route and season for migration

4.Which can be the best title for the text?

A.Funny Golf B.Great Migration

C.Crab Crossing D.Crab Hazards

高一英语阅读选择中等难度题查看答案及解析

Crossing your legs is an extremely common habit; most people don’t even notice that they’re doing it when they sit down. While you may find it comfortable to sit with one knee crossed over the other, it might be causing health problems that you are not aware of.

A study published in Blood Pressure Monitoring stated that sitting with your legs crossed can increase your blood pressure. The reason is that the blood in your legs has to work against gravity to be pumped back to your heart and that crossing one leg over the other increases resistance, making it even harder for the blood to circulate. This causes your body to increase your blood pressure to push the blood back to the heart. You won’t feel any immediate effects, but repeated, drawn-out increases in blood pressure can cause long term health problems. So, panning to sit for a long period of time? Don’t keep your legs crossed.

Crossing your legs at the knee can also cause pressure on the major nerve in your leg that passes just below your knee and along the outside of your leg, explains Richard Graves, a medical expert. This pressure can cause numbness and temporary paralysis of some of the muscles in your foot and leg, preventing you from being able to raise your ankle. While the feeling of discomfort may only last a minute or two, repeatedly crossing your legs until they feel numb can cause permanent nerve damage.

So next time you sit down, try to get yourself in the habit of sitting with both of your feet on the floor. Not only will it help your posture and stability, but it will also save your health in the long run.

1.What can we learn about crossing one’s legs?

A.It is a very bad social habit. B.It is usually practiced by design.

C.It can make others feel uncomfortable. D.It has a negative effect on people’s heath.

2.We may conclude from the study that sitting with your legs crossed can ________.

A.improve the function of legs B.help your blood resist gravity

C.effect your blood pressure D.cause health problems instantly

3.According to Richard Graves, repeatedly crossing your legs may ________.

A.paralyze all of your muscles B.preventing you from standing up

C.damage your nerve in the leg in the end D.reduce the pressure on the major nerve

4.What is the main purpose of the text?

A.To blame a bad habit. B.To provide suggestions.

C.To introduce research methods. D.To show effects of an experiment.

高一英语阅读选择中等难度题查看答案及解析

　　 If you will be cycling, you will need to know what these traffic signs and signals mean.

A sign like this one means that there is a bike lane（道）. If there is a bike lane, you are required to use it. If there is not a bike lane, you should ride with traffic as far to the right side of the road as possible.

　 When the signal light turns green, cars go. When you cross the street at a signal light, you should wait for the walk signal. Be sure to look carefully to the left, right and left again, before crossing the street.

When the signal light turns yellow, car drivers should slow down and prepare to stop. You should not cross if the light is yellow. The light is about to turn red, and cars will enter the intersection(十字路口).

This signal is the WALK sign. It has a picture of a person walking instead of using the word WALK.

This signal is the DON’T WALK sign. It is part of the signal with the picture of a person walking. This is a picture of a red hand, meaning you should stop. You should wait to cross the street until the green picture of the person walking is showing.

Car drivers and bikers must come to a complete stop at STOP signs.

A yield sign means to slow down and be ready to stop. If there are pedestrians（行人）or vehicles in or nearing the intersection, you must stop. If there is no traffic in or nearing the intersection and it is safe, you may go through.

This sign means you are coming to a crosswalk. Car drivers and bikers must stop to allow people in the crosswalk to cross the street.

1.The passage is intended for 　　　　　　　　　 .

A.car drivers B.skaters

C.bikers D.pedestrians

2.If you see the sign while riding a bike, you are required to 　　　　　　　　　 .

A.take the bike lane B.stop your bike

C.ride close to the right side of the road D.ride in the middle of the road

3.Which of the following signs has the same meaning as the sign?

A. B. C. D.

4.When the signal light turns yellow, cyclists 　　　　　　　　　 .

A.can cross the road B.should walk across the road

C.should wait D.can enter the intersection

高一英语阅读选择简单题查看答案及解析

Ocean food plays a very important part in our food supply. Not so long ago, the world’s oceans were filled with different types of fish. Now, a large increase in global overfishing has threatened that supply.

According to the United Nations Food and Agriculture Organization, 90 percent of the world’s fisheries (渔场) are either being fully exploited (开发), or are at risk of being closed down.

With fish supplies running out at home, fishermen are traveling further to find their catch. Frequently, fishermen are crossing over into other countries. As fish supplies closer to their homeland’s shores are decreasing fishermen cross borders to find fish.

Overfishing can be found everywhere, from Mexican fishing boats off the US coast of Florida to Russian fishing boats in the western Bering Sea. However, the effect is felt the strongest in the South China Sea.

On the other side of the world, West Africa is now seeing malign effects of overfishing. For coastal African countries, such as Senegal, the fishing industry is a large part of the national economy. The World Bank reports nearly 20 percent of the Senegalese are working in the fishing industry. Rashid Sumaila is the Director of Fisheries Economic Research at the University of British Columbia. He says communities that depend on fish for income and food, like Senegal, are now at risk.

1.Why do fishermen cross borders to catch fish?

A.Because they want to protect the environment.

B.Because they want to enjoy the overseas scenery.

C.Because fish supplies in their countries are decreasing.

D.Because fishing is not allowed in their own countries.

2.Where can the most serious overfishing be seen according to the text?

A.In Russia. B.In the South China Sea.

C.Off the US coast of Florida. D.In the western Bering Sea.

3.What does the underlined word “malign” in the last paragraph probably mean?

A.Harmful. B.Satisfying.

C.Hopeful. D.Beneficial.

4.What can be inferred from the last paragraph?

A.Most people in Africa will be out of work.

B.The World Bank will lend money to fishermen.

C.Rashid Sumaila is unconcerned about overfishing.

D.Overfishing has some bad effects on African people.

高一英语阅读选择中等难度题查看答案及解析

We all know that exercise is good for our health. To stay healthy, doctors suggest doing 150 minutes of moderate（适度的）exercise every week. But some kinds of exercise may be better than others. Running, for example, may help to protect against heart disease and other health problems.1. Compared to non-runners, runners show 30% lower risk of death," researchers said.

2.Here are four commonly shared ideas among fitness experts to reduce the risk of injuries for people new to running.

• Take it easy.3. Most people get running injuries when they push themselves too hard. The body needs time to get used to increases in distance or speed. Muscles（肌肉）and joints（关节）need time to recover.

• Get good running shoes. There is no single best shoe for every runner. You should find the shoes that offer the best fit for your feet. More importantly, you should replace your shoes every 500 to 800 kilometers.

•4.Take some time after each run to write down notes about what you did and how you felt. Look for patterns, things that happen over and over again.

• Cross train. As we said earlier, running is hard on your body. So physical fitness experts suggest some forms of cross training to improve muscle balance and to help you stay injury-free. For example, swimming, cycling and yoga are good exercises to combine with running.5.

A.Take good notes.

B.Running also may help you live longer.

C.Running takes a lot of time.

D.Running may be good exercise, but it can be difficult on the body.

E.As we all know, doing sports helps us teamwork.

F.These exercises are easier on the body.

G.Do not run too much, too soon or too fast.

高一英语七选五中等难度题查看答案及解析

In recent years, experiments examining exercise and weight loss have found that people lose far much less weight than expected, considering how many additional calories(卡路里) they are burning with their workouts.

Scientists have guessed that exercisers are likely to become hungrier and eat more after working out. They also may sit longer when not doing exercise. Together or separately, these changes could make up for the extra energy used during exercise.

To prove that possibility, scientists came up with the idea of using infrared light(红外线) to track mice’s movements in their cages. Then software can use that information to analyse their daily physical activity.

So the researchers prepared special cages, putting inside some locked running wheels, and let mice roam(闲逛) and explore for four days in the cages. This provided the researchers with information about how many calories each mouse burned every day.

Then the wheels were unlocked and for nine days, the mice could run at will, and they could decide how much to eat and when to get off the wheels, walking around. The mice,which enjoyed running, jumped readily on the wheels and started to run. On and off the wheels, they could run for hours. They showed a following height in their daily energy expenditure(支出) since they had added exercise to their lives.

But they did not change their eating habits. Although they were burning more calories, they did not eat more. They did, however, change how they moved. They now usually jogged on their wheels for a few minutes, jumped off, rested or roamed in a while, and then climbed back on the wheels, ran, rested, briefly roamed, and it repeated. These changes in how they spent their time almost counteracted(抵消) the extra calorie costs from running, says Daniel Lark, who led the new study.

What caused the running mice to run less is still uncertain. ''But it does not seem to have been tiredness or lack of time; wheel running is not arduous for mice, and does not fill their waking hours.'' Dr. Lark says.

Instead, he says, it is likely that the animals’ bodies and brains sensed the increasing energy expenditure when the mice began to run and sent out biological signals that somehow advised the animals to slow down, save energy and lose weight.

Mice will never be people, of course, so we cannot say whether the results of this would directly apply to us, Dr. Lark says. But the results do indicate that if we hope to lose more weight through, we should watch what we eat and try not to move less while we work out more.

1.What did NOT change for the mice in the experiment?

A.How they moved. B.How long they ran.

C.How much they chose to eat. D.How they spent their time.

2.What happened to the mice in the experiment according to the 6th paragraph?

A.They didn't like to run the wheels. B.They ate more after running the wheels.

C.They spent less time roaming in the cage. D.They didn't need rest after running the wheels.

3.The underlined word ''arduous'' in paragraph 7 is closest in meaning to _______.

A.tiring B.energetic C.difficult D.different

4.Which of the following statements may Dr. Lark agree with?

A.Wheel running costs the same amount of energy as roaming does.

B.The mice ran more because they really wanted to lose weight.

C.The experiment is a failure because the results don't apply to humans.

D.It might not be tiredness that caused the mice to run less.

5.The purpose of writing this passage is _______.

A.to prove that scientists' guess about exercising is wrong

B.to introduce a recent research on exercise and weight loss

C.to analyze how wheel running changes mice's movements

D.to explain why eating and running are bad for exercisers

高一英语阅读选择困难题查看答案及解析

Professional athletes in most sports start to slow down after the age of 35. Some retire (退役). Jamaican Olympic runner Usain Bolt has talked about retiring, for example. He is only 30 years old. But on Thursday, Serena Williams earned a spot in the Australian Open finals. She will face her older sister, Venus, who won her semifinal (半决赛) match a day earlier. It is the first time that the Williams sisters will play in a Grand Slam final since 2009. Venus is 36. Serena is 35. One of them will win the championship (冠军) at last.

One older champion will play in the men’s final, too. Roger Federer qualified for the final by defeating Stan Wawrinka. Federer, like Serena Williams, is 35 years old It will be one of the sport’s oldest finals in a long time.

Ken Rosewall of Australia is the oldest winner of a Grand Slam. He was 37 when he won the Australian Open in 1972.

Serena Williams is already the oldest winner of a women’s Grand Slam match. She won Wimbledon last year at the age of 34.

Many people are impressed that three of the finalists are 35 or older. All of the players have recently had injuries (受伤). Federer missed six months due to back and knee injuries.

He told the crowd that he did not think he would be able to make it back to a Grand Slam final.

The Williams sisters have had difficulties, too. Earlier this month, Venus won a match in New Zealand but withdrew (退出) from the final after hurting her arm. She also learned in 2011 she had the immune system disorder. The disorder kept her from practicing and staying in good physical condition for a number of years.

Serena took time off to recover from knee and shoulder injuries after losing in the semifinals of the U. S. Open last September. It is the ninth time that the sisters will face each other in a major final. Serena has defeated her sister six of those times. If she wins, Serena will beat Steffi Graff’s record for the most Grand Slam titles ever in women’s tennis.

1.Who will win the championship in the Grand Slam final this time according to Paragraph 1?

A. Usain Bolt.

B. Stan Wawrinka.

C. One of the Williams sisters.

D. Steffi Graff.

2.What do the final players have in common?

A. Their sports skills are falling.

B. They all have physical problems.

C. They are all considering retiring.

D. Their old ages influence their retiring.

3.What do you know about Serena from the last paragraph?

A. She will set a record if she wins this time.

B. She was beaten by her sister in most cases.

C. She needs time to recover from her injuries.

D. Her knee and shoulder injuries made her lose to her sister.

高一英语阅读理解中等难度题查看答案及解析

阅读理解。

We already know the fastest,least expensive way to slow down climate change:use less energy.With a little effort,and not much money,most of us could reduce our energy diets by 25 percent or more—doing the Earth a favor while also helping our wallets.

Not long ago,my wife,PJ,and I tried a new diet—not to lose a little weight but to answer an annoying question about climate change.Scientists have reported recently that the world is heating up even faster than predicted only a few years ago,and that the consequences(后果)could be severe if we don’t keep reducing emission(排放)of carbon dioxide(CO2)and other greenhouse gases that are trapping heat in our atmosphere.

We decided to try an experiment.For one month we recorded our personal emission of CO2.We wanted to see how much we could cut back,so we went on a strict diet.The average US household produces about 150 pounds of CO2 a day by doing common things like turning on air conditioning or driving cars.That’s more than twice the European average and almost five times the global average,mostly because Americans drive more and have bigger houses.But how much should we try to reduce?

For an answer,I checked with Tim Flannery,author of The Weather Makers:How Man Is Changing the Climate and What It Means for Life on Earth.In his book,he had challenged readers to make deep cuts in personal emission to keep the world from reaching extremely important tipping points,such as the melting(融化) of the ice sheets in Greenland or West Antarctica.“To stay below that point,we need to reduce CO2 emission by 80 percent,”he said.

Good advice,I thought.I’d opened our bedroom windows to let in the wind.We’d gotten so used to keeping our air-conditioning going around the clock.I’d almost forgotten the windows even opened.We should not let this happen again.It’s time for us to change our habits if necessary.

1.Why did the author and his wife try a new diet?

A.To take special kinds of food.

B.To respond to climate change.

C.To lose weight.

D.To improve their health.

2.The underlined words“tipping points”most probably refer to “　　 ”.

A.freezing points 　　　　　　　　　 B.burning points

C.melting points 　　　　　　　　　　 D.boiling points

3.According to the passage,Tim Flannery　　 .

A.made deep cuts in his personal emission of CO2

B.wrote a book about the climate changes

C.succeeded in reducing CO2 emission by 80 percent

D.was an author popular among readers

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

A.Saving Energy Starts at Home

B.Changing Our Habits Begins at Work

C.Changing Climate Sounds Reasonable

D.Reducing Emission of CO2 Proves Difficult

高一英语阅读理解中等难度题查看答案及解析

The little boy came riding at full speed down the motorway on his bicycle.

it was!

A. What a dangerous scene　　　　　 B. What dangerous a scene

C. How a dangerous scene　　　　　　 D. How dangerous the scene

高一英语单项填空中等难度题查看答案及解析