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[主观题]

Once somebody thought that air pollution affected only the area immediately around large c

ities with factories and heavy automobile traffic. Today, we know that although these are the areas with the worst air pollution, the problem is literally worldwide. On several occasions over the past decade, a heavy cloud of air pollution has covered the entire eastern half of the United States and led to health warnings even in rural areas away from any major concentration of manufacturing and automobile traffic. In-fact, the very climate of the entire earth may be affected by air pollution. Some scientists feel that the increasing concentration of carbon dioxide in the air resulting from the burning of fossil fuels (coal and oil) is creating a greenhouse effect—holding in heat reflected from the earth and raising the world's average temperature. If this view is correct and the world's temperature is raised only a few degrees, much of the polar ice cap will melt and cities such as New York, Boston, Miami, and New Orleans will be under water.

Another view, less widely held, is that increasing particular matter in the atmosphere is blocking sunlight and lowering the earth's temperature—a result that would be equally disastrous. A drop of just a few degrees could create something close to a new ice age, and would make agriculture difficult or impossible in many of our top farming areas. At present we do not know for sure that either of these conditions will happen (though one recent government report prepared by experts in the field concluded that the greenhouse effect is very likely). Perhaps, if we are very lucky, the two tendencies will offset each other and the world's temperature will stay about the same as it is now.

This passage is mainly concerned with______.

A．the greenhouse effect

B．the potential effect of air pollution

C．the burning of fossil fuels

D．the probability of a new ice age

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更多“Once somebody thought that air…”相关的问题

第1题

_______ you understand this rule, you'll have no further difficulty

A.Once

B.Though

C.Until

D.Unless

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第2题

The writer concludes that school rules to forbid smoking ______.A．should be introduced, fo

The writer concludes that school rules to forbid smoking ______.

A．should be introduced, for it really works at the school where he once studied

B．should not be introduced, for it may cause disturbance

C．should be introduced though it may not work effectively

D．needn't be introduced as long as teachers don't smoke in front of children

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第3题

Public education suffers from what can be diagnosed as the sickness of an overgoverned soc

iety. This sickness denies many parents control over the kind of education their children receive. The power once held by parents has gravitated to professional educators. The sickness has been aggravated by increasing centralization and bureaucratization of schools. Which of the following, if true, would weaken the claim that there is continuing erosion of parents control over their childrens education？

A．As a result of community pressure, growing numbers of school administrators follow recommendations made by parents.

B．The number of professional educators has risen sharply over the last decade even though the number of students has declined.

C．Parents" organizations that lobby for changes in school curriculums are generally ineffectual.

D．More members of school boards are appointed by school administrators than are elected by the public.

E．The use of state-wide curriculum programs increased in the Untied States during the past two decades.

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第4题

Ernest Miller Hemingway was born on July 21, 1899 in Oak Park, Illinois. In the nearly six

ty two years of his life that followed, he built a literary fame unsurpassed (无法超越)in the twentieth century.

As a boy he was taught by his father to hunt and fish along the shores and in the forests around Lake Michigan. The Hemingways had a summer house in northern Michigan, and the family would spend the summer months there trying to stay cool. Hemingway would either fish the different streams that ran into the lake, or would take the small boat out to do some fishing there. He would also go squirrel hunting in the woods, discovering early in life the peace to be found while alone in the forest or going through a stream. It was something he could always go back to throughout his life, and though he often found himself living in major cities like Chicago, Toronto and Paris early in his life, once he became successful he chose somewhat isolated places to live in.

When he wasn't hunting or fishing his mother taught him the good points of music. She was a skilled singer who once had wished a life on stage, but at last settled down with her husband and spent her time by giving voice and music lessons to local children, including her own. Hemingway was never talented for music and suffered through singing practices and music lessons, however, the musical knowledge he got from his mother helped him share in his first wife Hadley's interest in the piano.

Ernest Hemingway died in______.

A．1969

B．1979

C．1981

D．1961

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第5题

Ernest Miller Hemingway was born on July 21, 1899 in Oak Park, Illinois. In the nearly six

ty two years of his life that followed, he built a literary fame unsurpassed (无法超越)in the twentieth century.

As a boy he was taught by his father to hunt and fish along the shores and in the forests around Lake Michigan. The Hemingways had a summer house in northern Michigan, and the family would spend the summer months there trying to stay cool. Hemingway would either fish the different streams that ran into the lake, or would take the small boat out to do some fishing there. He would also go squirrel hunting in the woods, discovering early in life the peace to be found while alone in the forest or going through a stream. It was something he could always go back to throughout his life, and though he often found himself living in major cities like Chicago, Toronto and Paris early in his life, once he became successful he chose somewhat isolated places to live in.

When he wasn't hunting or fishing his mother taught him the good points of music. She was a skilled singer who once had wished a life on stage, but at last settled down with her husband and spent her time by giving voice and music lessons to local children, including her own. Hemingway was never talented for music and suffered through singing practices and music lessons, however, the musical knowledge he got from his mother helped him share in his first wife Hadley's interest in the piano.

Ernest Hemingway died in______.

A．1969

B．1979

C．1981

D．1961

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第6题

Tom had once worked in a city office in London, but now he is out of work. He had a large

family to support, so he often found himself in difficulty. He often visited Mr. White on Sundays, told him about his troubles, and asked for two or three pounds. Mr. White, a man with a kind hear(, found it difficult to refuse the money, though he himself was poor. Tom had already received more than thirty pounds from Mr. White, but he always seemed to be in need of some more.

One day, after telling Mr. White a long story of his troubles, Tom asked for five pounds.

Mr. White had heard this sort of thing before, but he listened patiently to the end. Then he said, "I understand your difficulties, Tom. I' d like to help you. But I' m not going to give you five pounds this time. I'll lend you the money, and you can pay me off next time you see me."

Tom took the money, but he never appeared again.

Tom was now in difficulties because he ______.

A．worked in a city office and was poorly paid

B．was poorly paid and had a large family to support

C．was poorly paid and always spent money carelessly

D．was out of work and had a large family to support

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第7题

Black Americans have served with honor in every American military action, though this fact

if often omitted in history books. Even though black men almost had to beg to be al- lowed to serve in the Revolutionary War, they went on to serve well. Two blackmen, Oliver Cromwell and Prince Whipple, were with Washington when he crossed the Delaware on Christmas Day, 1776, to attack the British at Trenton. A black man named Estabrook captured the Royal Army's general Prescott Newport, and Peter Salem, a black, killed Major Pitcairn as he was savoring his expected victory at Bunker Hill.

Even though they were forced to serve in separated units, black soldiers distinguished themselves in combat. This was despite the fact the whites had long believed that blacks could neither command nor use firearms. In 1863, William Carney of the Massachusetts Colored Infantry received the Congressional Medal of Honor for his role in battles with the Plains Indians. Isaiah Dorman, Coster's black scout, served and died at the Little Big Horn in 1876. Henry Flipper was the first black graduate of West Point in 1877.

In World War I, 40,000 black American combat soldiers served with the French command. Neither U.S. nor British commanders would use these men. But Henry Johnson and Needham Roberts, soldiers in the 369th Infantry's black “Hellfighters” were still the first Americans to win the Croix de Guerr, France's top military award.

During World War II over 600,000 black men and women served in the armed forces, including some 400,000 who served overseas. Dorie Miller, a black mess attendant in navy, was one of our first heroes in this war. At Pearl Harbor during the Japanese sneak attack, he manned a machine gun and shot down four planes. The black fighter pilots of Benjamin Davis, Jr. distinguished themselves throughout the war. They served most courageously during the Italian campaign. During the war in Vietnam, mainly because of civil rights pressures in America but also owing to the fine record of black military units, all American forces were fully integrated. Once again blacks played vital roles. And 13. 2 percent of all war deaths were of blacks, even though blacks constitute only 11 percent of all Americans. Black American soldiers continue to serve their land well.

The main idea this passage is that______.

A．black Americans made contributions in the Revolutionary War

B．black Americans have admirably served their country in at least five wars

C．black Americans suffered a larger portion of war deaths in Vietnam than did any other minorities

D．black Americans served under the French command in World War I

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第8题

The horse and carriage is a thing of the past, but love and marriage are still with us and

still closely interrelated. Most American marriages, particularly first marriages【C1】______ young Couples, are the result of【C2】______ attraction and affection【C3】______ than practical considerations.

In the United States, parents do not arrange marriages for their children. Teenagers begin【C4】______ in high school and usually find mates through their own academic and social【C5】______ .

Though young people feel【C7】______ to choose their friends from【C6】______ groups, most choose a mate of similar background.

This is【C8】______ in part to parental guidance. Parents cannot select spouses for their children, but they can usually【C9】______ choices by【C10】______ disapproval of someone they consider unsuitable.

【C11】______ , marriages between members of different groups (interclass, interfaith, and interracial marriages) are increasing, probably because of the greater【C12】______ of today's youth and the fact that they are restricted by【C13】______ prejudices than their parents. Many young people leave their home towns to attend college,【C14】 ______ in the armed forces,【C15】______ pursue a career in a bigger city.

Once away from home and family, they are more【C16】______ to date and marry outside their own social group.

In mobile American society, interclass marriages are neither【C17】______ nor shocking. Interfaith marriages are【C18】______ the rise particularly between Protestants and Catholics. On the other hand, interracial marriage is still very uncommon. It can be difficult for interracial couples to find a place to live, maintain friendships, and【C19】______ a family. Marriages between people of different national【C20】______ (but the same race and religion) have been commonplace here since colonial times.

【C1】

A．involving

B．linking

C．connecting

D．correlating

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第9题

Human beings need to drink for their survival. Water ranks【61】on the list of all-time safe

fluids. But not all water is as safe as once【62】. Recent tests of water fountains in several U. S. cities show that many fountains give water containing large【63】of lead (铅) , a poisonous metal. A recent study of 900 water fountains in Los Angeles【64】that half of the fountains【65】contained higher amounts of lead than the【66】the experts consider【67】. In other cities【68】results of tests were announced; too much lead in many, though【69】, drinking fountains. Water doesn't normally contain any lead, but when it passes through pipes, it can【70】. People who drink the water【71】the lead. An adult' s body passes most of the lead【72】the body, but children' s【73】retains more than half the lead【74】. This makes children more likely to be affected. Lead can damage the kidneys, cause【75】and impair learning and memory.【76】four million children in U. S. A. already have high levels of lead in their bodies. Most of this lead comes from【77】polluted with the metal. They can【78】it up from eating dirt or paint chips containing lead. In【79】to limit the lead in water fountains, officials recently suggested that fountains【80】to have too much lead be replaced or repaired. And that certainly requires a lot of money.

(61)

A．high

B．highly

C．higher

D．height

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第10题

One of the industrial giants who changed American society was Henry Ford born on a farm in

Michigan in 1863, and he grew up to bring forth some of the most revolutionary improvements in automotive technology in the early 20th century. His outstanding mechanical ability led him to become interested in the new automobiles in the early 1900s. Though he did not invent the automobile, he improved upon everyone else's designs. He was a person who believed in inexpensive, efficient production, so he established standards for his plants and workers. He also standardized and produced many new auto parts for his Ford Motor Company cars. Then he studied the workers' problems and thousands of automobiles per year. In fact, his plants had produced 15 million Model TS by 1927. Ford's personality was not all thrift(节俭), efficiency and inventiveness, however. He was a man who was cold and who could not keep pace with the competition due to his own rigidity(严格). His company suffered because of his desire to maintain the existing state instead of meeting and beating the competition by changing his products. Finally, he saw that he must change or fail, therefore, he introduced a newtype engine and once again took over the automobile market. Ford left a legacy of millions of dollars, millions of jobs for American workers, and millions of satisfied customers.

Henry Ford changed the American society ______. ()

A．through great social revolution

B．through automotive technological revolution

C．through numerous mechanical inventions

D．through radical political reforms

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