What effect does the writer create by asking herself questions in Para.11（).

What effect does excessive positive ions have on some people？

A．They think they are mad.

B．They feel very tired.

C．They become violently sick.

D．They are too tired to do anything.

s？

A．It helps to determine whether it is necessary to start a business.

B．It helps to decide how great a business success is.

C．It helps to further provide a business opportunity.

D．It helps to evaluate the business potential effectively.

A．It stops the water in the frog’s cells from freezing in cold weather

B．It lowers the temperature in the spaces between the frog’s cells

C．It causes the frog’s cells to produce more starch

D．It allows the frog’s cells to produce more water

A.To romanticists,poetry is an expression of an individual's feelings and experiences no matter how fragmentary and momentary these felings and experiences are.

B.Romanticist take delight only in sound effect,the theme of a work is not their concer.

C.Romanticist are not patient people

D.they would leave before the revelation of the theme.

E.Poetry should present the apparent and tangible.

Passage One

Questions 46 to 50 are based on the following passage.

Living in an urban area with green spaces has a long-lasting positive impact on people&39;s mental well-being, a study has suggested. UK researchers found moving to a green space had a sustained positive effect, unlike pay rises or promotions, which only provided a short-term boost. Co-author Mathew White, from the European Centre for Environment and Human Health at the University of Exeter, UK, explained that the study showed people living in greener urban areas were displaying fewer signs of depression or anxiety. "There could be a number of reasons,” he said, “for example, people do many things to make themselves happier: they strive for promotion or pay rises, or they get married. But the trouble with all those things is that within six months to a year, people are back to their original baseline levels of well-being. So, these things are not sustainable; they don’t make us happy in the long term. We found that for some lottery(彩票)winners who had won more than ￡500,000 the positive effect was definitely there, but after six months to a year, they were back to the baseline."Dr. White said his team wanted to see whether living in greener urban areas had a lasting positive effect on people&39;s sense of well-being or whether the effect also disappeared after a period of time. To do this, the team used data from the British Household Panel Survey compiled by the University of Essex.Explaining what the data revealed, he said: "What you see is that even after three years, mental health is still better, which is unlike many of the other things that we think will make us happy." He observed that people living in green spaces were less stressed, and less stressed people made more sensible decisions and communicated better

With a growing body of evidence establishing a link between urban green spaces and a positive impact on human well-being, Dr. White said, “There’s growing interest among public policy officials, but the trouble is who funds it. What we really need at a policy level is to decide where the money will come from to help support good quality local green spaces.”

According to one study, what do green spaces do to people？

A.Improve their work efficiency

B.Add to their sustained happiness

C.Help them build a positive attitude towards life

D.Lessen their concerns about material well-being

What does Dr. White say people usually do to make themselves happier？A.Earn more money

B.Gain fame and popularity

C.Settle in an urban area

D.Live in a green environment

What does Dr. White try to find out about living in a greener urban area？A.How it affects different people

B.How strong its effect is

C.How long its positive effect lasts

D.How it benefits physically

What did Dr. White research reveal about people living in a green environment？A.Their stress was more apparent than real

B.Their decisions required less deliberation

C.Their memories were greatly strengthened

D.Their communication with others improved

According to Dr. White, what should the government do to build more green spaces in cities？A.Find financial support

B.Improve urban planning

C.Involve local residents in the effort

D.Raise public awareness of the issue

请帮忙给出每个问题的正确答案和分析，谢谢！

s： Reliable

Sensitive to color

Can assess heading

Can identify small targets

Can see light configurations

Can assess ship types

Can identify conspicuous marks

Can identify flashing lights Has better discrimination

Can see changing weather patterns

Can see effect of sea on vessel

Not affected by blind arcs (if observer moves)．

问题： BLIND ARCS mean ______ ．

A.the arcs from which one can not see certain objects

B.the arcs which are blind

C.the black arcs

D.the arcs from which one can see certain objects

This paragraph is a ______ ．A.a clause of a contract

B.an explanation of advantage of eyes over radar

C.a requirement from a government

D.an article of Colreg

DISCRIMINATION means the ______ ．A.provision

B.dimension

C.distinction

D.permission

The eye is more ______ than radar．A.distinguishable

B.reasonable

C.controllable

D.reliable

请帮忙给出每个问题的正确答案和分析，谢谢！

Q: What made English a widely used language？

W: Hi, Leo. Why do you say English will become the world language？

M: Well, for one thing, it's so commonly used. The only language that is used by more people is Chinese.

W: Why is English spoken by so many people？

M: It's spoken in many countries of the world because of the British Empire. And now, of course, there's influence of America as well.

W: Many students find English a difficult language to learn.

M: Oh, all languages are difficult to learn. But English does have two great advantages.

W: What are they？

M: Well, first of all, it has a very international vocabulary. It has many German, Dutch, French, Spanish and Italian words in it. So speakers of those languages will find many familiar words in English. In fact, English has words from many other languages as well.

W: Why is that？

M: Well, partly because English speakers have travelled a lot. They bring back words with them, so English really does have an international vocabulary.

W: And what's the other advantage of English？

M: It's that English grammar is really quite easy. For example, it doesn't have dozens of different endings for its nouns, adjectives and verbs, not like Latin, Russian, and German for example.

W: Why is that？

M: Well, it's quite interesting actually. It's because of the French. When the French ruled England, French was the official language and only the common people spoke English. They try to make the language as simple as possible, so they made the grammar easier.

A.It has words from many languages.

B.Its popularity with the common people.

C.The influence of the British Empire.

D.The effect of the Industrial Revolution.

ce cameras with controversial face recognition technology. Virginia Beach and Tampa in Florida two cities in the United States acquired the technology, which cost them $ 197, 000.” “Before we switched it on, we went through an extensive public education process with hearings and the involvement of citizen groups and minority groups, who helped write the policies we are using, " said deputy police chief Greg Mullen. A citizens' auditing committee has the right to perform. unannounced spot checks on police headquarters to make sure the technology is not being misused.

Three of the city's 13 cameras are linked full time to the face recognition system, though the others can be activited as needed. The database of wanted people is updated every day. So far, the system has failed to produce a single arrest, though it has generated a few false alarms. It works by analyzing faces based on a series of measurements, such as the distance from the tip of the nose to the chin or the space between the eyes. Critics say it is highly inaccurate and can be easily fooled. Mullen, who sees the system eventually being linked to the databases of other city, state and federal law enforcement agencies to track criticals and suspected terrorists, said, "The system doesn't look at skin color or your hair or your gender. It takes human prejudices out of the equation. "

"This technology has little or no effect on the crime rate but it does have an effect on people's behavior. People feel cowed, " said Bruce Steinhardt, who directs the technology. Despite the fact that tests have shown faces recognition only works in around 30% cases, the ACLU is alarmed that the technology may soon spread to airports. The organization also fears it could potentially be used to monitor individual's political activities to harass law-abiding citizens.

" This kind of surveillance should be subject to the same procedures as wiretaps. Law enforcement agencies should justify why they need it and it should be tightly limited, otherwise it will soon become a tool of social control, " said Mihir Kshisagar of the Electronic Information Privacy Center. Nor does such criticism come exclusively from the political left. Lawyer John Whitehead, founder of the conservative Rutherford Institute, wrote in an editorial that the technology threatened the right of each U. S. citizen to participate in society. "After all, that is exactly what constant surveillance is—the ultimate implied threat of coercion, " he wrote.

What does Mullen's statement in Paragraph 1 indicate？

A．Police is confident in using the technology.

B．Police has made preparation for the use of the technology.

C．Citizens have rights over managing the technology.

D．Police has gone through public education process.

e Earth's Gravity(重力) pulls it. But every cloud is made of water droplets or ice crystals. Why doesn't rain or snow fall constantly from all clouds？ The droplets or ice crystals in clouds are exceedingly small. The effect of gravity on them is minute. Air currents move and lift droplets so that the net downward displacement is zero, even though the droplets are in constant motion.

Droplets and ice crystals behave somewhat like dust in the air made visible in a shaft(束) of sunlight. To the casual observer, dust seems to act in a totally random fashion, moving about wildly without fixed direction. But in fact dust particles are much larger than water droplets and they finally fall. The cloud droplet of average size is only 1/2,500 inch in diameter. (78)It is so small that it would take sixteen hours to fall half a mile in perfectly still air, and it does not fall out of moving air at all. Only when the droplet grows to a diameter of 1/125 inch or larger can it fall form. the cloud. The average raindrop contains a million times as much water as a tiny cloud droplet. The growth of a cloud droplet to a size large enough to fall out is the cause of rain.

What is the main topic of the passage？

A．The mechanics of rain.

B．The climate of North America.

C．How gravity affects air current.

D．Types of clouds.

Edition (W. W. Norton) Schlesinger provides deep insights into the crises of nationhood in America. A new chapter assesses the impact both of radical multiculturalism and radical monoculturalism on the Bill of rights. Written with his usual clarity and force, the book brings a noted historian' s wisdom and perspective to bear on America' s "culture wars".

Schlesinger addresses the questions: What holds a nation together？ And what does it mean to be an American？ Describing the emerging cult of ethnicity, Schlesinger praises its healthy effect on a nation long shamed by a history of prejudice and narrow-mindedness. But he warns against the campaign of multicultural advocates to divide the nation into separate ethnic and racial communities. From the start, he observes, the United States has been a multicultural nation, rich in its diversity but held together by a shared commitment to the democratic process and by the freedom of intermarriage. It was this national talent for assimilation that impressed foreign visitors like Alexis de Tocqueyille and James Bryce, and it is this historic goal that Schlesinger champions as the best hope for the future. Schlesinger analyzes what he sees as grim consequences of identity politics: the widening of differences. Attacks on the First Amendment, he argues, threaten intellectual freedom and, ultimately, the future of the ethnic groups. His criticisms are not limited to the left. As a former target of McCarthyism, be understands that the radical right is even more willing than the radical left to re strict and weaken the Bill of Rights.

The author does not minimize the injustices concealed by the "melting pot" dream. The Disuniting of America is both academic and personal, forceful in argument, balanced in judgment. It is a book that will no doubt anger some readers, but it will surely make all of them think again. The winner of Pulitzer Prizes for history and for biography, an authoritative voice of American liberalism, Schlesinger is uniquely positioned to bring bold answers and healing wisdom to this passionate debate over who we are and what we should become.

According to Schlesinger, the United States is ______.

A．a melting pot

B．a nation with diverse cultures held together by the democratic process

C．a federation of ethnic and racial communities

D．a nation with various ethnic and racial groups