________ birds use their feathers for flight,...

________ birds use their feathers for flight, some of their feathers are for other purposes.

A.Once B.If C.Although D.Because

高二英语单项填空中等难度题查看答案及解析

Many old Chinese people have the concept of ________ some money for their future use.

A. picking up                           B. setting aside                 C. putting off             D. setting up

高二英语单项填空简单题查看答案及解析

Why don’t birds get lost on their long migratory (迁居的) flights? Scientists have puzzled over this question for many years. Now they’re beginning to fill in the blanks.

Not long ago, experiments showed that birds rely on the sun to guide them during daylight hours. But what about birds that fly mainly by night? Tests with artificial stars have proved conclusively that certain night-flying birds are able to follow the stars in their long-distance flights.

One such bird, a warbler(鸣禽) , had spent its lifetime in a cage and had never flown under a natural sky. Yet it showed an inborn ability to use the stars for guidance. The bird’s cage was placed under an artificial star-filled sky at migration time. The bird tried to fly in the same direction as that taken by his outdoor cousins. Any change in the direction of the make-be-live stars caused a change in the direction of his flight. Scientists think that warblers, when flying in daylight, use the sun for guidance. But the stars are apparently their main means of navigation (导航). What do they do when the stars are hidden by clouds? Apparently, they find their way by such landmarks as mountain ranges, coast lines, and river courses. But when it’s too dark to see these, the warblers circle helplessly, unable to get their direction.

1.The reasons why birds don’t get lost on migratory flights__________.

2.Warblers migrate__________.

3.When the stars are hidden by clouds, warblers find their way by__________ .

4.This article is a good example of the way scientists__________ .

高二英语阅读理解困难题查看答案及解析

Technology is making life easier for some dairy farmers. They use robotic systems to milk their cows. These systems are designed to reduce labor and increase milk production.

Cows are trained to follow a series of paths that lead to the milking stations. Only one cow at a time can enter the station. Once inside，the cow is rewarded with food. As the cow eats，a robotic arm cleans and connects the animal to the milking machine. A few minutes later，the milking is completed. The gate is lifted. The cow leaves and the next cow enters. The robotic systems are designed to operate twenty­ four hours a day. Cows are milked on average about three times a day. Some are milked four to six times a day. The cows wear collars(颈圈) around their necks that identify them to the system. A computer keeps records on their eating and milking. A cow is released from the station if the computer decides it should not be milked. The system also measures the temperature and color of the freshly produced milk. Milk is thrown away if it does not pass the tests. Cows need two to four weeks to learn to use the robotic milking systems. Once trained，the cows no longer require human assistance，unless something goes wrong.

Professor Plaut heads the Department of Animal Science at Michigan State University. She believes the systems will attract especially the next generation of farmers who are more interested in technology and less interested in working all the time on the farm. Still，she says the price of robotic milking systems will continue to limit their use. Doug Suhr has more than one hundred milking cows on his farm. Last year it became the fourth farm in southeast Minnesota to get a robotic milking system. A recent story in a local agricultural newspaper said the first robot cost $175，000 and the second cost $150，000.Doug says the increase in milk production reaches a high of more than 6kg per cow per day.

1.Under robotic milking systems，______ decide(s) whether a cow is suitable to be milked.

A．the robotic arms 　　　 B．the dairy farmers

C．the cows themselves　　 D．a computer

2.When is human assistance needed during the milking?

A．When the cows enter the milking station every morning.

B．When a robotic arm connects a cow to the milking machine.

C．When the cows are trained to use the robotic milking system in the first two to four weeks.

D．When the temperature and color of the freshly produced milk are measured.

3.Which of the following statements is TRUE according to the last paragraph?

A．Since Doug got the robotic milking system，milk production on his farm has increased.

B．The price of milking machines decreases $25，000 every year.

C．Doug has the largest farm in southeast Minnesota.

D．There are four farms in southeast Minnesota that have robotic milking systems so far.

4.It can be inferred from the passage that ________.

A．the price of robotic milking systems will greatly decrease

B．robotic milking systems are still too expensive to be popular

C．most farmers are too old to use robotic milking systems

D．robotic milking systems don't need to work at night

高二英语阅读理解中等难度题查看答案及解析

Technology is making life easier for some dairy farmers. They use robotic systems to milk their cows. Cows are trained to follow a series of paths that lead to milking stations. Only one cow at a time can enter a station.

Once inside, the cow is rewarded with food. As the cow eats, a robotic arm cleans and connects the animal to the milking machine. A few minutes later, milking is complete. The gate is opened, the cow is released and the next cow enters.

The robotic systems are designed to operate 24 hours a day. The cows get to decide when they want to be milked. Cows are milked an average of about three times a day. Some are milked four to six times a day.

The cows wear collars around their necks that identify them to the system. A computer keeps records on their eating and milking. A cow is released from the station if the computer decides it should not be milked.

The automated system also measures the temperature and color of freshly produced milk. Milk is thrown away if it does not pass the tests.

Professor Plaut believes the systems will appeal especially to the next generation of farmers. She means young people who are more interested in technology and less interested in working all the time on the farm. Still, she says the price of robotic milking systems will continue to limit their use.

Doug and Tina Suhr have more than 100 cows on their family farm. Last year it became the fourth farm in southeast Minnesota to get a robotic milking system. A recent story in a local agricultural newspaper said the first robot cost 175 000 dollars. The second cost 150 000.

Doug told AgriNews that wages that would have been paid for one employee in five years will pay for one robot. He says the increase in milk production reaches a high of more than six kilograms per cow per day.

1.From the first paragraph, we can infer________.

A．the robotic system is designed to reduce labor

B．cows can be raised by robots in the future

C．robots direct cows into milking stations

D．cows are kept clean by robots on some farms

2.Besides milking cows, the robotic system also can ________.

A．adjust the temperature of milking stations

B．judge the quality of fresh milk

C．improve the appetite of cows

D．keep fresh milk for two weeks

3.Why is the robotic system not popular now?

A．Because young people have no interest in it.

B．Because it is difficult to learn how to use it.

C．Because people can’t afford to buy it.

D．Because it usually causes the waste of milk.

4.According to Doug, what is the wage of an employee?

A．150, 000-170, 000.  B．750, 000.          C．150, 000 -30, 000.   D．30, 000- 32, 000

5.The best title for the passage may be_______.

A．Letting robot milk your cow               B．Milking cows by hand

C．Improving the quality of milk               D．Drinking fresh milk every day

高二英语阅读理解中等难度题查看答案及解析

Technology is making life easier for some dairy farmers. They use robotic systems to milk their cows. Cows are trained to follow a series of paths that lead to milking stations. Only one cow at a time can enter a station.

Once inside，the cow is rewarded with food. As the cow eats，a robotic arm cleans and connects the animal to the milking machine. A few minutes later，milking is complete. The gate is opened，the cow is released and the next cow enters.

The robotic systems are designed to operate 24 hours a day. The cows get to decide when they want to be milked. Cows are milked an average of about three times a day. Some are milked four to six times a day.

The cows wear collars around their necks that identify them to the system. A computer keeps records on their eating and milking. A cow is released from the station if the computer decides it should not be milked.

The automated system also measures the temperature and color of freshly produced milk. Milk is thrown away if it does not pass the tests.

Professor Plaut believes the systems will appeal especially to the next generation of farmers. She means young people who are more interested in technology and less interested in working all the time on the farm. Still，she says the price of robotic milking systems will continue to limit their use.

Doug and Tina Suhr have more than 100 cows on their family farm. Last year it became the fourth farm in southeast Minnesota to get a robotic milking system. A recent story in a local agricultural newspaper said the first robot costs 175,000 dollars. The second costs 150,000 dollars.

Doug told AgriNews that wages that would have been paid for one employee in five years will pay for one robot. He says the increase in milk production reaches a high of more than six kilograms per cow per day.

1.According to Doug，what is the wage of an employee per year?

A．$150,000～$175,000.　　　　　　 B．$150,000～$30,000.

C．$30,000～$35,000.　　　　　　　 D．over $75,000.

2.Besides milking cows，the robotic system also can ________.

A．judge the quality of fresh milk

B．keep fresh milk for two weeks

C．adjust the temperature of milking stations

D．improve the appetite of cows

3.Why is the robotic system not popular now?

A．Because it usually causes the waste of milk.

B．Because it is difficult to learn how to use it.

C．Because young people have no interest in it.

D．Because people can't afford to buy it.

4.From the first paragraph，we can infer ________.

A．cows can be raised by robots in the future

B．robots direct cows into milking stations

C．the robotic system is designed to reduce labor

D．cows are kept clean by robots on some farms

高二英语阅读理解中等难度题查看答案及解析

Some netizens use “beat a call” as an ________ to “cheering for” to show their approval or support for others.

A. alternative　　 B. account

C. apology　　 D. acquaintance

高二英语单项填空简单题查看答案及解析

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

1.To pay for their purchases, people will use smart card, which contain a tiny chip, instead of _______．

2.The form is very important: the number of lines and the number of__________．

3.Poetry aften follows special___________ of rhythm and rhyme．

4.Reading poetry in English also opens the door to finding new ways of ________ yourself in Chinese．

5.It forms the mainland of Great Britain and ______of three countries:Scotland in the north, Wales in the west and England in the south and east．

6.The culture of the people of the Bitish Isles was _________by the culture of the people on the European mainland．

7.The British Isles are a group of islands that lies off the west coast of_______．

8.Only the northern counties, _____up Northern Ireland, are still part of the United Kingdom．

9.There are six spoken languages that are _______to be native to the British Isles as well as two local accents．

10.What life will be like in the future is difficult to_________．

11.Current trends ________ that transpotation is becoming cleaner, faster and safer．

12.Many companies and consumers have already begun _______ the way they they do business．

13.With a better understanding of human body, scientists and physicians will be able to ________ more diseases．

14.If we learn to accept change and appreciate what is new and different, we will be well-prepared for__________ the future may have in store．

15.AIDS is a disease that breaks down the body’s immune _________ and leaves a person defenceless against infections and illnesses．

高二英语填空题困难题查看答案及解析

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