_______ that they may eventually reduce the a...

_______ that they may eventually reduce the amount of labor needed on construction sites by 90 percent.

A. Such construction robots are clever

B. So clever the construction robots are

C. So clever are the construction robots

D. Such clever construction robots are

高二英语单项填空中等难度题查看答案及解析

___ that may generally reduce the amount of labor needed on construction sites by 90 percent.

A．So clever the construction robots

B．Such construction robots are clever

C．So clever are the construction robots

D．Such clever construction robots are

高二英语单项填空困难题查看答案及解析

It is high time that we ____ the amount of carbon dioxide in our daily life.

A. reduce     B reduced    C will reduce   D reduces

高二英语单项填空中等难度题查看答案及解析

Reducing the amount of sleep affects students’ performance at school. An American study asked schoolteachers to look at the effects of sleep restriction(限制） on children between six and twelve years of age. The teachers found that children who stayed up late had trouble thinking clearly and had more learning problems.

1. 　　　　　　 Doctor Fallone now works at the Forest Institute of Professional Psychology in Springfield, Missouri. He presented the results last month at a science reporter conference in Washington, D. C.. The publication Sleep also reported the findings.

The teachers were asked to complete weekly performance reports on seventy-four schoolchildren. The study lasted three weeks. During that period, Doctor Fallone and his team controlled the amount of sleep the children received.

2. 　　　　　 During another week, every child was kept awake later than normal. Each night, the youngest boys and girls had less than eight hours of sleep. The older ones were limited to six and a half hours. During the final week of the study, each child received no less than ten hours of sleep a night.

The teachers were not told about how much sleep the students received. The study found that students who received eight hours or less had the most difficult remembering old information. 3.

The study did not find that sleep restriction caused hyperactivity(极度活跃) in the children. 4.　　　　　　　 .

Doctor Fallone said that the results provided experts and parents with a clear message: 5.

A. The sleeping time that the students have can be changed easily.

B. They also had trouble learning new information, completing difficult work and following directions.

C. During one week, the children went to bed and awoke at their usual time.

D. The teacher should restrict the amount of the sleep of the students.

E. Gahan Fallone did the study at the Brown Medical School and Bradley Hospital in the state of Rhode Island.

F. The teachers reported that students were, in fact, a little less active at school when they got less sleep.

G. When a child has learning problems, the issue of sleep must be considered among the possible causes.

高二英语其他题中等难度题查看答案及解析

Reducing the amount of salt in our diets could save nearly 20,000 lives in the UK every year, according to researchers.

The recommended maximum daily intake for adults is 6g in the UK, although just month the World Health Organization (WHO) revised this down to 5g. Yet according to figures from the British Heat Foundation, men consume around 9.7g a day, while women have 7.7 g.

Not researchers at three universities, including Harvard Medical School, have revealed the dramatic effect reducing salt could have on death rates by using computer models. They estimated that reducing salt intake to 6g would save 500,000 to 850,000 lives in the US over the next decade.

British doctor Ian Campbell, medical director of charity Weight Concern, told Mail Online: Salt is a big problem in the UK, too. It’s a silent killer. Over time consuming too much of it increases the risk of high blood pressure, which can lead to heart attacks. About 80 percent of our salt intake comes from processed foods, so it can be difficult to avoid.

Many people are unaware of where salt is hidden, such as bread, soups, ready meals, and even breakfast cereals (麦片). The government approach has been to encourage food companies to cut the amount of salt in their products. There has been a reduction but it is taking too long. The Food Standards Agency should consider setting compulsory maximum levels for salt.

Victoria Taylor, Senior Dietitian at the British Heat Foundation, added: Eating too much salt may raise your blood pressure and having high blood pressure increases your risk of developing heart disease.

The government has worked with the food industry to reduce the amount of salt in our food and make labels clearer. But there is still work to be down by everyone because the majority of Brits are still consuming more salt than they would be.

1.Which of the following in the table reaches the daily maximum amount of salt recommended by the WHO?

A. A large chips and a McDonald’s Big Mac.

B. A spicy crayfish and a large chips.

C. An original chicken and a spicy crayfish.

D. A McDonald’s Big Mac and an original chicken.

2.According to the passage, when people eat processed food they ________.

A. needn’t add salt

B. should add a little salt

C. may ruin their health

D. can have risk of heart attacks

3.To solve the problem of eating too much salt, Ian Campbell advises ________.

A. having healthier breakfast

B. punishing the illegal food companies

C. reducing the amount of processed food

D. making laws about maximum levels for salt

4.The last paragraph emphasizes the importance of ________.

A. making food tables clearer

B. monitoring the food industry

C. promoting the awareness of salt content

D. strengthening the government’s functions

高二英语阅读理解中等难度题查看答案及解析

根据短文内容，从短文后的选项中选出能填入空白处的最佳选项。选项中有两项为多余选项。

Reducing the amount of sleep affects students’ performance at school. An American study asked schoolteachers to look at the effects of sleep restriction（限制） on children between six and twelve years of age. The teachers found that children who stayed up late had trouble thinking clearly and had more learning problems.

1.　 Doctor Fallone now works at the Forest Institute of Professional Psychology in Springfield, Missouri. He presented the results last month at a science reporter conference in Washington, D. C. The Publication Sleep also reported the findings.

The teachers were asked to complete weekly performance reports on seventy-four schoolchildren. The study lasted three weeks. During that period, Doctor Fallone and his team controlled the amount of sleep the children received.

2.　 During another week, every child was kept awake later than normal. Each night, the youngest boys and girls had less than eight hours of sleep. The older ones were limited to six and a half hours. During the final week of the study, each child received no less than ten hours of sleep a night.

The teachers were not told about how much sleep the students received. The study found that students who received eight hours or less had the most difficulty remembering old information.　 33.

The study did not find that sleep restriction caused hyperactivity(极度活跃) in the children. 　 4.

Doctor Fallone said that the results provided experts and parents with a clear message: 　 5.

A. The sleeping time that the students have can be changed easily.

B. They also had trouble learning new information, completing difficult work and following directions.

C. During one week, the children went to bed and awoke at their usual time.

D. The teacher should restrict the amount of sleep of the students.

E. Gahan Fallone did the study at the Brown Medical School and Bradley Hospital in the state of Rhode Island.

F. The teachers reported that students were, in fact, a little less active at school when they got less sleep.

G. When a child has learning problems, the issue of sleep must be considered among the possible causes.

高二英语七选五中等难度题查看答案及解析

History of Broadway

When people think of Broadway, they may think of that part of the world-famous road in New York City that runs between 42nd and 53rd Streets. 1. It is a billion-dollar industry that includes theatrical shows in New York and live theater entertainment throughout the world.

New York's Theatre District has only 39 official Broadway houses. A play house must have 500 or more seats to be considered a Broadway theater. 2. Not all Broadway theatres are located on Broadway. In the late 1700s and early 1800s, buildings on Wall Street and places such as City Hall may have served as smaller theaters, and other locations in downtown New York City also did.

Today’s Broadway started when influential families contributed development of larger theaters away from the downtown area. Some people may have doubted these theaters would be successful, but they turned out to be. 3. With the rise of the new theater district, downtown changed forever as people happily traveled to the outskirts (郊区) of the city to see the best in live entertainment.

When these theaters began, many actors came from European countries. In 1857 actor Edwin Booth helped transform the Broadway theatre by popularizing a type of acting realism. Unlike actors before him, Booth did not stand still on the stage and simply deliver his lines. 4. Booth's style had a notable effect on the theater, and many considered him to be the greatest actor of his time.

5. Specifically, comedies and dramas often centred on then-current events such as women's right to vote, the Labor Movement, and war. Broadway developed again in 1866, and the Broadway musical was created. From then on, actors entertained their audiences by singing and dancing accompanied by an orchestra.

Now, Broadway is famous for various theatre productions and moving performances.

A.In fact, the shows have brought it fame throughout the world.

B.However, Broadway is much more than a geographical location.

C.Theatres, holding 100 to 499 people, are called Off-Broadway theatres.

D.Instead, he liked moving around and showing great emotion while acting.

E.Plays followed a popular style that encouraged typical characters and plots.

F.As this new style grew in popularity, the content of the shows began to change.

G.Madison Square Theater, built by the Mallory family in 1880, was one of them.

高二英语七选五困难题查看答案及解析

A new study shows that rising levels of planet-warming gases may reduce important nutrients in food crops.

Researchers studied the effects of one such gas—carbon dioxide—on rice. The researchers grew rice plants in a controlled environment. They set carbon dioxide levels to what scientists are predicting for our planet by the end of the century. They found that the resulting rice crops had lower than normal levels of vitamins, minerals and protein. The researchers said the effects of planet-warming gases would be most severe for the poorest citizens in some of the least developed countries. These people generally eat the most rice and have the least complex diets, they noted.

In the experiment, scientists grew 18 kinds of rice in fields in China and Japan. They pumped carbon dioxide gas over the plants in an effort to create the atmosphere of the future. Rice grown under high carbon dioxide conditions had, on average, 13 to 30 percent lower levels of four B vitamins and 10 percent less protein. The crops also had 8 percent less iron and 5 percent less zinc（锌）an rice grown under normal conditions. However, vitamin E levels increased by about 13 percent on average.

The results are bad news, “especially for the nutrition of the poorer population in less-developed countries,” said the University of Tokyo’s Kazuhiko Kobayashi, who helped to write the report. That includes about 600 million people in Indonesia, Cambodia, Myanmar, Bangladesh, Laos and other nations, mainly in Southeast Asia, the report said.

One of the scientists is Sam Myers of Harvard University in the American state of Massachusetts. He said that findings like this are an example of the surprises climate change create. “My concern is there are many more surprises to come,” he said.

Myers noted that pollution, loss of some species, destruction of forests, and other human activities are likely to produce unexpected problems. He said that you cannot completely change all the natural systems that living organisms have grown to depend on over millions of years without having effects come back to affect our own health.

The new study suggests a way to lower the nutritional harm of climate change. One way, Kobayashi said, is grow different forms of rice that have shown to be more resistant to higher carbon dioxide levels.

1.Which county would be influenced most by planet-warming gases according to the text?

A. China　　 B. Britain　　 C. America　　 D. Myanmar

2.How is Paragraph 3 mainly developed?

A. By comparison.　　 B. By giving examples.

C. By analyzing causes.　　 D. By describing a process.

3.What does the underlined sentence in Paragraph 5 mean?

A. Climate change will be difficult to predict.

B. Climate change will lead to more good effects.

C. Climate change will be harmful to environment.

D. Climate change will cause more unexpected problems.

4.Which of the following statements is true according to the text?

A. Myers said we could change all the natural systems for the sake of our health.

B. The poorest people in all the least developed countries would be influenced most.

C. The researchers grew 18 kinds of rice in China and Japan in a controlled environment.

D. Protein in rice grown under high carbon dioxide conditions is increased by 10 percent.

高二英语阅读理解困难题查看答案及解析

After months of a frustrating voyage on the rough sea, they eventually came to _____ they called their “dream land”.

A. where    B. what    C. how    D. which

高二英语单项填空中等难度题查看答案及解析

The U.S. Department of Labor statistics (统计) show that there is an oversupply of college-trained workers and that this oversupply is increasing. Already there have been more than enough teachers, engineers, physicists, aerospace experts, and other specialists. Yet colleges and graduate schools continue every year to turn out highly trained people to compete for jobs that aren't there. The result is that graduates cannot enter the professions for which they were trained and must take temporary jobs which do not require a college degree.

On the other hand, there is a great need for skilled workers of all sorts: carpenters, electricians, mechanics, plumbers, TV repairmen.

These people have more work than they can deal with, and their annual incomes are often higher than those of college graduates. The old gap that white-collar workers make a better living than blue-collar workers no longer holds true. The law of supply and demand now favors the skilled workmen.

The reason for this situation is the traditional myth that college degree is a passport to a prosperous future. A large part of American society matches success in life equally with a college degree. Parents begin indoctrinating (灌输) their children with this myth before they are out of grade school. High school teachers play their part by acting as if high school education were a preparation for college rather than for life. Under this pressure the kids fall in line. Whether they want to go to college or not doesn't matter. Everybody should go to college, so of course they must go. And every year college enrollments (入学) go up and up, and more and more graduates are overeducated for the kinds of jobs available to them.

One result of this emphasis on a college education is that many people go to college who do not belong there. Of the sixty percent of high school graduates who enter college, half of them do not graduate with their class. Many of them drop out within the first year. Some struggle on for two or three years and then give up.

1.It's implied but not stated in the passage that ________ .

A. many other countries are facing the same problem

B. white-collar workers in the US used to make more money than blue-collar workers

C. fewer students will prefer to go to college in the future

D. the law of supply and demand has a strong effect on American higher education

2.Which of the following is NOT a reason why college enrollments go up every year?

A. Many people believe that the only way to success is a college education.

B. Many parents want their children to go to college.

C. High school teachers urge their students to go to college.

D. Every young man and woman wants to go to college.

3.By saying that“many people go to college who do not belong there”, the author means that　　 ________ .

A. many people who are not fit for college education go to college

B. many people who do not have enough money go to college

C. many people who go to college drop out within the first year

D. many people who go to college have their hopes destroyed

4.We can infer from the passage that the author believes that _______ .

A. every young man and woman should go to college

B. college education is a bad thing

C. people with a college education should receive higher pay

D. fewer people should go to college while more should be trained for skilled jobs

高二英语阅读理解中等难度题查看答案及解析