摘要：Which of the following can be inferred from this passage? A.The economy is more important to government than people’s health is. B.Governments think chemicals brings them more economic benefits than economic cost. C.The public knows enough about the dangers of chemical pollution. D.The governments fully realize the long-term economic costs of chemical pollution. C Vincent Van Gogh was an important painter of the 19th century.He was born in Holland,but he lived much of his life in France.He was a very emotional man,and there was much suffering in his life. His style of painting was very different from classical art.He painted pictures of the sunny,hot regions of France.He looked for interesting shapes and exciting colors.He liked to work freely and quickly.There is fast movement in many of his paintings.Sometimes the trees look like fire.The sun,moon,and stars move rapidly in the sky.He also painted pictures of people. Paul Gauguin was another 19th century painter.He was French and a friend of Van Gogh.Before he became an artist,Gauguin had been a businessman for many years.He made a lot of money and he liked to buy modern,paintings. At the age of 35 Gauguin decided to become a painter himself.Money had become too important to many people.Gauguin wanted to discover more important things about man.He went to a different Part of France to live with the farmers.He painted pictures of French country people there.Two years later he went to live in a small place in the Pacific Ocean,thousands of miles from France.He wanted to learn about the simple life there.His most famous and interesting paintings were painted at that time.

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In the United States in the early 1800’s, individual state governments had more effect on the economy than did the federal government. States controlled manufacturing, banking, mining and transportation firms and participated in the construction of various internal improvements such as canals, turnpikes（收费关卡）, and railroads. The states encouraged internal improvements in two distinct ways: first, by actually establishing state companies to build such improvements; second, by providing part of the capital for mixed public-private companies setting out to make a profit.
In the early nineteenth century, state governments also engaged in a surprisingly large amount of direct restricting activity, including extensive licensing and inspection programs. Licensing targets reflected both similarities in and difference between the economy of the nineteenth century and that of today: in the nineteenth century, state regulation through licensing fell especially on drug dealers, innkeepers and retail merchants of various kinds. The goods of trade generally came under state inspection and such important raw material as lumber and gunpowder were also subject to state control. Finally, state governments experimented with direct labor and business regulation designed to help the individual laborer or consumer, including setting maximum limits on hours of work and restrictions on price-fixing by business.
Although the states dominated economic activity during this period, the federal government was not inactive. Its goals were the facilitation of western settlement and the development of native industries. Toward these ends the federal government pursued several courses of action. It established a national bank to stabilize banking activities in the country and, in part, to provide a supply of relatively easy money to the region, where it was greatly needed for settlement. It permitted access to public western lands on increasing easy term, with a summit in the Homestead Act of 1862, by which title to land could be claimed on the basis of residence alone. Finally, it set up a system of tariffs（关税） that was basically protectionist in effect, although maneuvering for position by various regional interests produced frequent changes in tariff rates throughout the nineteenth century.

1.
What does the passage mainly discuss？
1. A.
  States rights versus federal rights.
2. B.
  The participation of state governments in railroad, canal, and turnpike construction.
3. C.
  The roles of state and federal government in the economy of the nineteenth century.
4. D.
  Restricting activity by state government.
2.
It can be inferred from the first paragraph that in the nineteenth century canals and railroads were ______.
1. A.
  built with money that came from the federal government
2. B.
  much more expensive to build than they had been previously
3. C.
  built predominantly in the western part of the country
4. D.
  sometimes built in part by state companies
3.
According to the passage, which of the following is true of the Homestead Act of 1862？
1. A.
  It increased the money supply in the West.
2. B.
  It was a law first passed by state government in the West.
3. C.
  It made it increasingly possible for settlers to obtain land in the West.
4. D.
  It established tariffs in a number of regions.
4.
Which of the following activities was the responsibility of the federal government in the nineteenth century？
1. A.
  Control of the manufacture of gunpowder.
2. B.
  Determining the conditions under which individuals worked.
3. C.
  Regulation of the supply of money.
4. D.
  Inspection of new homes built on western lands.

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　　In the United States in the early 1800’s, individual state governments had more effect on the economy than did the federal government. States controlled manufacturing, banking, mining and transportation firms and participated in the construction of various internal improvements such as canals, turnpikes（收费关卡）, and railroads. The states encouraged internal improvements in two distinct ways: first, by actually establishing state companies to build such improvements; second, by providing part of the capital for mixed public-private companies setting out to make a profit.
　　In the early nineteenth century, state governments also engaged in a surprisingly large amount of direct restricting activity, including extensive licensing and inspection programs. Licensing targets reflected both similarities in and difference between the economy of the nineteenth century and that of today: in the nineteenth century, state regulation through licensing fell especially on drug dealers, innkeepers and retail merchants of various kinds. The goods of trade generally came under state inspection and such important raw material as lumber and gunpowder were also subject to state control. Finally, state governments experimented with direct labor and business regulation designed to help the individual laborer or consumer, including setting maximum limits on hours of work and restrictions on price-fixing by business.
　　Although the states dominated economic activity during this period, the federal government was not inactive. Its goals were the facilitation of western settlement and the development of native industries. Toward these ends the federal government pursued several courses of action. It established a national bank to stabilize banking activities in the country and, in part, to provide a supply of relatively easy money to the region, where it was greatly needed for settlement. It permitted access to public western lands on increasing easy term, with a summit in the Homestead Act of 1862, by which title to land could be claimed on the basis of residence alone. Finally, it set up a system of tariffs（关税） that was basically protectionist in effect, although maneuvering for position by various regional interests produced frequent changes in tariff rates throughout the nineteenth century.
1.What does the passage mainly discuss？
　　A. States rights versus federal rights.
　　B. The participation of state governments in railroad, canal, and turnpike construction.
　　C. The roles of state and federal government in the economy of the nineteenth century.
　　D. Restricting activity by state government.
2.It can be inferred from the first paragraph that in the nineteenth century canals and railroads were ______.
　　A. built with money that came from the federal government
　　B. much more expensive to build than they had been previously
　　C. built predominantly in the western part of the country
　　D. sometimes built in part by state companies
3.According to the passage, which of the following is true of the Homestead Act of 1862？
　　A. It increased the money supply in the West.
　　B. It was a law first passed by state government in the West.
　　C. It made it increasingly possible for settlers to obtain land in the West.
　　D. It established tariffs in a number of regions.
4.Which of the following activities was the responsibility of the federal government in the nineteenth century？
　　A. Control of the manufacture of gunpowder.
　　B. Determining the conditions under which individuals worked.
　　C. Regulation of the supply of money.
　　D. Inspection of new homes built on western lands.

查看习题详情和答案>>

　　In the early nineteenth century, state governments also engaged in a surprisingly large amount of direct restricting activity, including extensive licensing and inspection programs. Licensing targets reflected both similarities in and difference between the economy of the nineteenth century and that of today: in the nineteenth century, state regulation through licensing fell especially on drug dealers, innkeepers and retail merchants of various kinds. The goods of trade generally came under state inspection and such important raw material as lumber and gunpowder were also subject to state control. Finally, state governments experimented with direct labor and business regulation designed to help the individual laborer or consumer, including setting maximum limits on hours of work and restrictions on price-fixing by business.

　　Although the states dominated economic activity during this period, the federal government was not inactive. Its goals were the facilitation of western settlement and the development of native industries. Toward these ends the federal government pursued several courses of action. It established a national bank to stabilize banking activities in the country and, in part, to provide a supply of relatively easy money to the region, where it was greatly needed for settlement. It permitted access to public western lands on increasing easy term, with a summit in the Homestead Act of 1862, by which title to land could be claimed on the basis of residence alone. Finally, it set up a system of tariffs（关税） that was basically protectionist in effect, although maneuvering for position by various regional interests produced frequent changes in tariff rates throughout the nineteenth century.

1.What does the passage mainly discuss？

　　A. States rights versus federal rights.

　　B. The participation of state governments in railroad, canal, and turnpike construction.

　　C. The roles of state and federal government in the economy of the nineteenth century.

　　D. Restricting activity by state government.

2.It can be inferred from the first paragraph that in the nineteenth century canals and railroads were ______.

　　A. built with money that came from the federal government

　　B. much more expensive to build than they had been previously

　　C. built predominantly in the western part of the country

　　D. sometimes built in part by state companies

3.According to the passage, which of the following is true of the Homestead Act of 1862？

　　A. It increased the money supply in the West.

　　B. It was a law first passed by state government in the West.

　　C. It made it increasingly possible for settlers to obtain land in the West.

　　D. It established tariffs in a number of regions.

4.Which of the following activities was the responsibility of the federal government in the nineteenth century？

　　A. Control of the manufacture of gunpowder.

　　B. Determining the conditions under which individuals worked.

　　C. Regulation of the supply of money.

　　D. Inspection of new homes built on western lands.

查看习题详情和答案>>

1.What does the passage mainly discuss？

　　A. States rights versus federal rights.

　　B. The participation of state governments in railroad, canal, and turnpike construction.

　　C. The roles of state and federal government in the economy of the nineteenth century.

　　D. Restricting activity by state government.

2.It can be inferred from the first paragraph that in the nineteenth century canals and railroads were ______.

　　A. built with money that came from the federal government

　　B. much more expensive to build than they had been previously

　　C. built predominantly in the western part of the country

　　D. sometimes built in part by state companies

3.According to the passage, which of the following is true of the Homestead Act of 1862？

　　A. It increased the money supply in the West.

　　B. It was a law first passed by state government in the West.

　　C. It made it increasingly possible for settlers to obtain land in the West.

　　D. It established tariffs in a number of regions.

4.Which of the following activities was the responsibility of the federal government in the nineteenth century？

　　A. Control of the manufacture of gunpowder.

　　B. Determining the conditions under which individuals worked.

　　C. Regulation of the supply of money.

　　D. Inspection of new homes built on western lands.

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Most people know precious gemstones (宝石) by their appearances. An emerald flashes deep green, a ruby seems to hold a red fire inside, and a diamond shines like a star. It’s more difficult to tell where the gem was mined, since a diamond from Australia or Arkansas may appear the same to one from the Democratic Republic of the Congo. However, recently, a team of scientists has found a way to identify a gemstone’s origin.

Beneath the surface of a gemstone, on the tiny level of atoms and molecules（分子）, lie clues (线索) to its origin. At this year’s meeting of the Geological Society of America in Minneapolis, Catherine McManus reported on a technique that uses lasers (激光) to clarify these clues and identify a stone’s homeland. McManus directs scientific research at Materialytics, in Killeen, Texas. The company is developing the technique. “With enough data, we could identify which country, which mining place, even the individual mine a gemstone comes from,” McManus told Science News.

Some gemstones, including many diamonds, come from war-torn countries. Sales of those “blood minerals” may encourage violent civil wars where innocent people are injured or killed. In an effort to reduce the trade in blood minerals, the U.S. government passed law in July 2010 that requires companies that sell gemstones to determine the origins of their stones.

To figure out where gemstones come from, McManus and her team focus a powerful laser on a small sample of the gemstone. The technique is called laser-induced breakdown spectroscopy. Just as heat can turn ice into water or water into steam, energy from the laser changes the state of matter of the stone. The laser changes a miniscule part of the gemstone into plasma, a gas state of matter in which tiny particles（微粒）called electrons separate from atoms.

The plasma, which is superhot, produces a light pattern. (The science of analyzing this kind of light pattern is called spectroscopy.) Different elements（元素）produce different patterns, but McManus and her team say that gemstones from the same area produce similar patterns. Materialytics has already collected patterns from thousands of gemstones, including more than 200 from diamonds. They can compare the light pattern from an unknown gemstone to patterns they do know and look for a match. The light pattern acts like a signature, telling the researchers the origin of the gemstone.

In a small test, the laser technique correctly identified the origins of 95 out of every 100 diamonds. For gemstones like emeralds and rubies, the technique proved successful for 98 out of every 100 stones. The scientists need to collect and analyze more samples, including those from war-torn countries, before the tool is ready for commercial use.

Scientists like Barbara Dutrow, a mineralogist from Louisiana State University in Baton Rouge, find the technique exciting. “This is a basic new tool that could provide a better fingerprint of a material from a particular locality,” she told Science News.

1.We learn from Paragraph 1 that __________________.

A. an emerald and a ruby are names of diamonds.

B. it’s not difficult to tell where the gem was mined.

C. appearances help to identify the origin of gemstones.?

D. diamonds from different places may appear the same.

2.Why did the U.S. government pass law that requires companies selling gemstones to determine the origins of their stones?

A. To look for more gemstones.?????????????

B. To encourage violent civil wars.

C. To reduce the trade in blood minerals.??????

D. To develop the economy.

3.Which of the following facts most probably helps McManus and her team in identifying the origin of stones?

A. Heat can turn ice into water or water into steam.

B. Gemstones from the same area produce similar light patterns.

C. Laser can changes a miniscule part of the gemstone into plasma.

D. Materialytics has already collected patterns from thousands of gemstones.

4.From the last two paragraphs, what can be inferred about the laser technique?

A. It is ready for commercial use.

B. People can use the new tool to find more gemstones.

C. It can significantly reduce the gemstones trade in blood minerals.

D. It will bring about a revolutionary change in identifying the origin of minerals.

5.The author wrote this passage mainly to ________.

A. tell us how to identify the origin of diamonds.

B. introduce a laser technique in identifying a stone’s origin

C. prove identifying the origin of gemstones are difficult

D. attract our attention to reducing trade in blood minerals

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What does the passage mainly discuss？

It can be inferred from the first paragraph that in the nineteenth century canals and railroads were ______.

According to the passage, which of the following is true of the Homestead Act of 1862？

Which of the following activities was the responsibility of the federal government in the nineteenth century？

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