Sharks use their good sense of smell to search for prey（猎物）. But a new study shows that the rising levels of carbon dioxide in the ocean could reduce sharks' ability to find food. It's bad news for a healthy ocean. Sharks are top predators（掠食动物）and are like the ocean's weed controllers.
Dixson works at the Woods Hole Oceanographic Institution in Massachusetts. Her earlier work has shown that clown fish in acidifying（酸化的）water act strangely. "We want to expand this research to sharks .because we know how important it is for sharks to find their food through their sense of smell," said Dixson.
Her team started by placing sharks in each of three different pools for five days. Each pool had a different level of carbon dioxide in it. The first had the same amount as today's ocean water. The second had a level of carbon dioxide that scientists expect to reach by 2050. The third pool had the highest level of carbon dioxide that could develop by the year 2100.
Sharks weren't allowed to eat any food while in the pools. This made sure that they would be hungry. Then, Dixson released the sharks one at a time into a pool with two side-by-side streams of flowing water. In one stream, the researchers pumped water, in which a dead squid had been overnight. This water smelled strongly of the squid. The other stream contained ocean water with no scent（气味）. Because each stream flowed at the same rate and in the same direction, the squid smell stayed in its stream. The sharks could choose to swim in either stream.
Sharks that had been swimming for five days in pools of regular ocean water spent more than 60 percent of their time in the squid-scented stream. The same was true for sharks that had been in water with the carbon dioxide level that could develop by the year 2050. But sharks exposed to the highest level of carbon dioxide spent just 15 percent of their time in the squid-scented stream.
1.Why did the writer mention the sharks smell at the beginning of the passage?
A. Because the writer appreciates their ability to find food.
B. Because the writer considers them dangerous to human beings.
C. Because the writer intends to show how to control weed in the ocean.
D. Because the writer worries about the sharks in the ocean.
2.What is Paragraph 3 mainly about?
A. What the ocean in the future will be like.
B. Who helped Dixson conduct the study.
C. What kinds of pools were used during the study.
D. What the levels of carbon dioxide will be at in the ocean in the future.
3.The researchers pumped water where a dead squid had been overnight to ______.
A. help the sharks look for food
B. test the sharks' sense of smell
C. prove that sharks like eating squids
D. explain why carbon dioxide in the ocean affects sharks
4.What does the underlined sentence in the last paragraph suggest?
A. Sharks like the squid-scented stream better.
B. Sharks like the stream with the high level of carbon dioxide.
C. Sharks spent 15% of their time in the squid-scented stream.
D. The high level of carbon dioxide can affect the sharks ability to smell.
高二英语阅读理解中等难度题
Sharks use their good sense of smell to search for prey（猎物）. But a new study shows that the rising levels of carbon dioxide in the ocean could reduce sharks' ability to find food. It's bad news for a healthy ocean. Sharks are top predators（掠食动物）and are like the ocean's weed controllers.
Dixson works at the Woods Hole Oceanographic Institution in Massachusetts. Her earlier work has shown that clown fish in acidifying（酸化的）water act strangely. "We want to expand this research to sharks .because we know how important it is for sharks to find their food through their sense of smell," said Dixson.
Her team started by placing sharks in each of three different pools for five days. Each pool had a different level of carbon dioxide in it. The first had the same amount as today's ocean water. The second had a level of carbon dioxide that scientists expect to reach by 2050. The third pool had the highest level of carbon dioxide that could develop by the year 2100.
Sharks weren't allowed to eat any food while in the pools. This made sure that they would be hungry. Then, Dixson released the sharks one at a time into a pool with two side-by-side streams of flowing water. In one stream, the researchers pumped water, in which a dead squid had been overnight. This water smelled strongly of the squid. The other stream contained ocean water with no scent（气味）. Because each stream flowed at the same rate and in the same direction, the squid smell stayed in its stream. The sharks could choose to swim in either stream.
Sharks that had been swimming for five days in pools of regular ocean water spent more than 60 percent of their time in the squid-scented stream. The same was true for sharks that had been in water with the carbon dioxide level that could develop by the year 2050. But sharks exposed to the highest level of carbon dioxide spent just 15 percent of their time in the squid-scented stream.
1.Why did the writer mention the sharks smell at the beginning of the passage?
A. Because the writer appreciates their ability to find food.
B. Because the writer considers them dangerous to human beings.
C. Because the writer intends to show how to control weed in the ocean.
D. Because the writer worries about the sharks in the ocean.
2.What is Paragraph 3 mainly about?
A. What the ocean in the future will be like.
B. Who helped Dixson conduct the study.
C. What kinds of pools were used during the study.
D. What the levels of carbon dioxide will be at in the ocean in the future.
3.The researchers pumped water where a dead squid had been overnight to ______.
A. help the sharks look for food
B. test the sharks' sense of smell
C. prove that sharks like eating squids
D. explain why carbon dioxide in the ocean affects sharks
4.What does the underlined sentence in the last paragraph suggest?
A. Sharks like the squid-scented stream better.
B. Sharks like the stream with the high level of carbon dioxide.
C. Sharks spent 15% of their time in the squid-scented stream.
D. The high level of carbon dioxide can affect the sharks ability to smell.
高二英语阅读理解中等难度题查看答案及解析
Dogs have a very good____ of smell and are often used to search for survivors in an earthquake.
A. sense B. manner C. means D. idea
高二英语单项填空中等难度题查看答案及解析
I used to be crazy about the hunting season. The excitement of waiting for a prey(猎物)and the pride of showing off the kill fascinated me. However, everything changed after that cold morning.
Early on that day of the late fall, I set off alone for the woods, packing a gun, a bottle of hot coffee and three thick sandwiches. After finding the fresh deer’s tracks in the snow, I settled down behind a little bush.
I sat there for about an hour. It was then that I saw him. A deer, a big beautiful deer! There was no cover nearer to him than 30 yards. Surely I couldn’t miss! I waited for him to realize I was there. I waited for him to be shocked and run away. But he fooled me completely. He came towards me! He was curious, I suppose, or maybe he was stupid---how else can you explain it? Well, that deer walked right up to where I was sitting. Then he stopped and looked at me!
What happened next is hard to believe, but it’s true. And it all seemed quite natural. Just as when a friendly young deer comes near you, I reached up and scratched his head. And he liked to be scratched. In fact, he practically asked for more. Then, I fed him my sandwich! Yes, I know what a deer eats, but that deer ate my sandwich. Well, he finally went his way, down the hill and up the deer trail. Shoot him? Not me. You wouldn’t have either, not after that. I just watched him go.
When I was about half way back, I heard two shots, followed by a dull slam(撞击)a few seconds later. Those two shots usually mean a kill. I had forgotten there were other hunters that day.
Those hunters would never know they could have scratched his head.
1.Why didn’t the author kill the deer?
A.He preferred to shoot a shy deer. B.He was fooled by the tricky deer.
C.He was sympathetic for the deer. D.He was too shocked to shoot the deer.
2.What most probably happened to the deer in the end?
A.Other hunters shot the deer to death.
B.Other hunters scratched the deer’s head too.
C.The deer managed to escape from being shot.
D.The deer would become friends with the author.
3.What’s the best title of this text?
A.A Hunting in Late Fall. B.A Lovely Deer.
C.The Cruel Killing. D.The Last Hunting.
高二英语阅读理解中等难度题查看答案及解析
We often just use our sense of sight, touch, smell, and taste to eat food. But what about our sense of hearing? Does sound also affect our dining experience?
A new report answers, “yes, it does.”
That answer comes from researchers at Brigham Young University and Colorado State University in the United States. They found that hearing is important in the eating experience.
Hearing is often called “the forgotten food sense”, says Ryan Elder. Elder is an assistant professor of marketing at Brigham Young University’s Marriott School of Management. He says that if people notice the sound the food makes as they eat it, they might eat less. On the other hand, watching loud television or listening to loud music while eating can hide such noises. And this could lead to overeating.
For the study, the researchers wanted to test whether the sounds of eating—chewing, chomping and crunching(松脆的)—had any effect on how much a person ate. During the experiments, the test subjects wore headphones and listened to noise at either a high or low audio level. Then researchers gave them a crunchy snack: pretzels. The study found that subjects who listened to the higher volume noise ate more pretzels than those with the low audio levels.
Elder says that when hiding I heard sounds of eating, like when you watch television or listen to loud music while eating, we take away the sense of hearing. And this may cause you to eat more than you would normally. The researchers are calling this, the “crunch effect”.
The researchers admit that the effects may not seem like much at one meal. But over a week, a month or a year, all that food can really add up.
1.Which sense is often ignored in the eating experience?
A. Sight. B. Smell.
C. Hearing. D. Touch.
2.Who would find this article helpful?
A. People who enjoys cooking food . B. People who cares about losing weight.
C. People who like watching TV . D. People who want to eat healthy food.
3.Why the researchers use “pretzels”?
A. They can make loud noise. B. They are delicious.
C. They are more available D. They are good for health.
4.Which can be the best title for the passage?
A. Be Mindful of Whatever You Eat B. Be Sensitive to Your Eating habits
C. Want to Lose Weight? Listen to yourself Eat D. Better Hear Than Eat
高二英语阅读理解中等难度题查看答案及解析
We often just use our sense of sight, touch, smell, and taste to eat food. But what about our sense of hearing? Does sound also affect our dining experience?
A new report answers, “yes, it does.”
That answer comes from researchers at Brigham Young University and Colorado State University in the United States. They found that hearing is important in the eating experience.
Hearing is often called “the forgotten food sense”, says Ryan Elder. Elder is an assistant professor of marketing at Brigham Young University’s Marriott School of Management. He says that if people notice the sound the food makes as they eat it, they might eat less. On the other hand, watching loud television or listening to loud music while eating can hide such noises. And this could lead to overeating.
For the study, the researchers wanted to test whether the sounds of eating—chewing, chomping and crunching—had any effect on how much a person ate. During the experiments, the test subjects wore headphones and listened to noise at either a high or low audio level. Then researchers gave them a crunchy snack: pretzels. The study found that subjects who listened to the higher volume noise ate more pretzels than those with the low audio levels.
Elder says that when hiding I heard sounds of eating, like when you watch television or listen to loud music while eating, we take away the sense of hearing. And this may cause you to eat more than you would normally. The researchers are calling this, the “crunch effect”.
The researchers admit that the effects may not seem like much at one meal. But over a week, a month or a year, all that food can really add up.
1.Which sense is often ignored in the eating experience?
A. Sight. B. Smell.
C. Hearing. D. Touch.
2.Who would find this article helpful?
A. People who enjoys cooking food.
B. People who cares about losing weight.
C. People who like watching TV.
D. People who want to eat healthy food.
3.Why the researchers use “pretzels”?
A. They can make loud noise. B. They are delicious.
C. They are more available D. They are good for health.
4.Which can be the best title for the passage?
A. Be Mindful of Whatever You Eat
B. Be Sensitive to Your Eating habits
C. Want to Lose Weight? Listen to yourself Eat
D. Better Hear Than Eat
高二英语阅读理解中等难度题查看答案及解析
It is universally that dogs have a good sense of smell.
| A．acknowledged | B．acknowledging | C．to be acknowledged | D．knowledge |
高二英语单项填空简单题查看答案及解析
The British are known for their sense of humor. However, it is often difficult for foreigners to understand their jokes. The main point to remember is that the British often use understatement.
Understatement means saying less than you think or feel. For example, if someone gets very wet in a shower of rain, he might say, “It's a little damp outside.” Or, if someone is very impolite and shouts at another person, someone else might say, “She isn't exactly friendly.” Understatement is often used in unpleasant situation or to make another person look silly. Understatement plays an important part in British humor.
Another key to understanding British humor is that the British like to make fun of themselves as well as others. They often laugh about the silly and unpleasant things that happen to our everyday life when someone accidentally falls over in the street. They also like to make jokes about people from different classes of society. They like to make jokes about their accents, the way they dress and the way they behave. What's more, the British love to watch comedies about people who do not know how to behave in society. The comedies series Mr. Bean is a good example of this kind of humor.
Mr. Bean is the character created by British actor Rowan Atkinson in 1990. Mr. Bean doesn't talk often, and instead he uses his body movement and facial expressions to make people laugh. Perhaps what makes Mr. Bean so funny is that he does things that adults in the real world cannot do. Mr. Bean is popular in many countries around the world because you do not have to speak English to understand the humor. Because of this, many people have become familiar with the British sense of humor.
1.Why is it difficult for foreigners to understand British jokes?
A.The British often use overstatement.
B.The British try to understate something.
C.British jokes are not as funny as jokes in other countries.
D.British jokes are connected with many different cultures.
2.The author explains understatement by _______.
A.describing a process B.making comparisons
C.following time order D.using examples
3.Mr. Bean makes others laugh by ______.
A.using his body movement and facial expressions
B.making jokes about others’ accent
C.copying how others behave
D.telling funny stories
4.What can be the best title for the text?
A.British Humor in Comedy B.Humor in Different Cultures
C.Understanding British Humor D.Developing Your Sense of Humor
高二英语阅读理解中等难度题查看答案及解析
Children are becoming addicted to social media for their sense of self-worth, a major study warned. It found many youngsters measure their status(形象) by public approval they get online, often through “likes”. Some change their conduct in real life to improve their image online.
The research into youngsters aged from 8 to 16 was carried out by Children's Commissioner(专员) Anne Longfield. She said social media firms were exposing children to major psychological risks, with some youngsters starting secondary school ill-equipped to deal with the huge pressure they faced online. Youngsters felt their friendships could be at risk, not responding to social media posts quickly and around the clock.
Children aged 8 to 10 were "starting to feel happy" when others liked their posts. However, those in the 10 to 12 age group were "concerned with how many people like their posts", indicating a “need” for social recognition that gets stronger the older they become.
Children tended to compare themselves to others online. "Then there is this push to connect—if offline, will you miss something, will you miss out, will you show you don't care about those you are following, all come together in a huge way at once." Miss Longfield said, "For children it’s very difficult to handle." The Commissioner found children as young as 8 were using social media platforms largely for fun.
However, the research—involving eight groups of 32 children aged 8 to 12—suggested that as they grew, they became increasingly anxious online. When they started secondary school—at age 11—children were already far more conscious of their image online and felt more pressure to ensure popularity of their posts, the research found.
Meanwhile, they still did not know how to dispose of mean-spirited jokes, or the possible sense of inability if compared with celebrities(名人) or more brilliant friends online. They also faced pressure to respond to messages at all hours of the day—especially at secondary school when more youngsters have mobile phones.
The Commissioner advocated schools and parents do more to prepare children for the emotional minefield(雷区) . "It's vital that new age-appropriate relationship and sex education lessons help equip children to deal with growing demands of social media.” Social media companies must "take more responsibility" and monitor websites better or adjust their websites to the needs of youngsters.
1.What may account for Children’s addiction to social media?
A.To get their status recognized. B.To reduce psychological risks.
C.To change their conduct in real life. D.To deal with huge emotional pressure.
2.How was the research conducted?
A.It covered children of all ages.
B.It sought assistance help from parents.
C.It was sponsored by social media companies.
D.It divided children into groups and compared them.
3.During the process of addiction, children have a tendency to ________.
A.switch off from social media platforms
B.become less conscious of their image online
C.pick up anxiety and pressure steadily while becoming older
D.develop skills to dispose of mean-spirited jokes and the sense of loss
4.How should the problem solved according to Anne Longfield ?
A.Children should be banned from visiting the web.
B.Schools must keep track of children's use of social media.
C.It demands cooperation among families, schools and companies.
D.Social media companies need to create more apps to satisfy youngsters.
高二英语阅读理解困难题查看答案及解析
Women have jumped ahead of men for the first time in using the Internet to do their holiday shopping, according to a study published last week in the US.
For years men have been more likely to shop on the Internet than women, but during the 2007 holiday season 58percent of those shopping on line were women, “It shows how popular the Internet is becoming,” said Lee Rainie, director of the Pew Internet and American Life Project group, which carried out the study, Rainie said it was only a matter of time before women shoppers caught up with men. This is because women traditionally make decisions about spending.
Users were more likely to shop online to save time. Internet users between the ages 18 and 29 were responsible for some of the surprising increase in the online gift-buying population this time around. However, three-quarters of the US Internet users did not buy holiday gifts online in 2007. they worried about credit card security(安全), or just compared online prices with off-line prices, then dashed off to the shops to get the best deals.
“But even if shoppers don’t buy online, websites are becoming promotion(促销) tools for stores, ” said Dan Hess, vice president of ComScore Network Inc. Hess said that actually most stores’ websites can make customers fully believe the security of their credit card numbers. And most are able to ensure that gifts arrive on time. “It’s all about making the shopping experience more efficient, more reliable and more comfortable.” Hess said.
1. Which of the following statements is true?
A. There were fewer women online shoppers than men in 2007.
B. Most of the Internet users between the ages of 18 and 29 are women.
C. More women shopped online than men in 2007.
D. People in the US were more likely to buy gifts online.
2.We can infer from the passage that______.
A. shopping online will be more popular in years
B. women usually decide what to buy in the family
C. the Internet is used in all shops
D. men usually decide how to spend money in the family
3.According to Dan Hess, shopping online ______.
A. is unsafe B. is convenient
C. is a waste of money D. is cheaper
4.Which of the following is the best title?
A. Women turn to online shopping
B. Men stop online shopping
C. More young people shop online
D. Shopping off-line provides better service
高二英语阅读理解中等难度题查看答案及解析
It is not always easy for the general public to see _____use a new invention can be of to their daily life.
A. which B. what C. that D. whose
高二英语单项填空中等难度题查看答案及解析