题目内容
_____ of concrete and steel, the
A. Building B. Built C. To built D. Having built
Los Angeles June 14, 2006 – Hollywood actress Daryl Hannah was arrested yesterday after spending two weeks sitting in a walnut tree on an urban farm a few kilometers from downtown Los Angeles. She was one of 40 people, including celebrities from the music and movie world, who were protesting at the proposed destruction of the 14 – acre farm. Police officers cut away branches from the tree and used a fire engine to reach Ms Hannah and her co – protester, environmentalist John Quigley. The two of them raised their fists in defiance（反抗）as they were removed.
Protesters, some of whom had chained themselves to concrete –filled barrels（桶），said that it was essential to keep the farm operating, as it provided food for hundreds of poor families in the area. About 350 people grow produce and flowers on the farm, which has been there for more than a decade and is situated in an inner –city area surrounded by warehouses and railroad tracks. However, the local authority recently approved plans for the area to be cleared and redeveloped for the construction of a huge new warehouse.
Ms Hannah, 45, star of films such as Splash and Kill Bill was not thrilled about being arrested. “But I felt it was important to show my support for the people,” she said. “This farm should be a model for sustainable (可持续的) urban agriculture. It needs to be replicated, not eradicated.”
The record length for a tree protest is held by a woman called Julia Hill, who remained on top of a 30-metre-high redwood tree in Northern California for 738 days from December 1997 to December 1999. She was successful in saving the tree and those around it from destruction. Ms Hill was also at the Los Angeles urban farm project this week, but her presence failed to stop the inevitable (不可避免的). No sooner had the protesters been removed than earth-moving machines moved in and began to clear the land.
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B．save a farm outside Los Angeles that provided jobs for the poor
C．complain to the local council about all their development plans
D．stop the police and fire department from cutting down trees
2．What did the protesters do?
A．40 of them chained themselves to trees.
B．They climbed trees with celebrities and refused to come down.
C．They all chained themselves to large pieces of concrete.
D．They fought with the police.
3．What did Daryl Hannah mean when she said “It needs to be replicated, not eradicated” in the third paragraph?
A．The new warehouse much provide jobs for the poor.
B．More farms should grow food for the cites not fewer.
C．The city farm was a model to be copied not destroyed.
D．The plans must be reconsidered and changed.
4．What happened after the protesters were removed?
A．They built the warehouse immediately.
B．They had hardly left when construction of the new building started.
C．As soon as they were gone, heavy machines cut down the trees.
D．The farm was saved.
_____ of concrete and steel, the Petronas Towers in Kuala Lampu could provide a better chance of surviving than did the World Trade Centre buildings.
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A．Building |
B．Built |
C．To built |
D．Having built |
Each year, road accidents kill a million people and injure millions more . The economic costs are greatest for developing countries . Earlier this year , the United Nations called for a campaign to improve road safety .
One way to avoid accidents is better driving . Another is better roads and bridges . Engineers in the Unites States have designed ten new concrete mixtures that they think could make bridges last longer .
Professor Paul Tikalsky leads the experiments by a team at Pennsylvania State University . He says bridges made of concrete now last about twenty-five to thirty-five years . But he says the new mixtures might extend that to seventy –five or even one-hundred years .
Concrete is made of stone , sand , water and cement(水泥). The materials in the cement hold the concrete together . Ancient Romans built with concrete . Yet strengthened concrete bridges did not appear until the late 1800s . People keep looking for new ways to improve concrete . Professor Tikalsky says it is one of the most complex of all chemical systems .
The new mixtures designed by his team contain industrial waste products . He says these make the concrete better able to resist damage from water and salt over time . One of the products is fly ash . This is released into the air as pollution when coal is burned .
Professor Tikalsky says particles (颗粒)of fly ash are almost exactly the same size and chemical structure as Portland cement . This is the most costly material in concrete . So using fly ash to replace some of it would save money .
The federal government is paying for part of the research . Engineers anywhere can use the technology . Professor Tikalsky says some of the ideas have already been put to use in China , the Philippines and other countries .
1.Why did the United Nations launch the campaign ?
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A．Because the United Nations wanted to reduce road accidents and economic costs |
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B．Because two million people were killed in the accidents . |
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C．Because engineers wanted to design ten new concrete mixtures . |
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D．Because the United Nations made bridges of the new mixtures which could last for about 20 to 35 |
years .
2.What does the underlined word “ this ” in the sixth paragraph refer to ?
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A．Fly ash |
B．Portland cement |
C．Sand |
D．Chemical |
3.Which of the following statements is TRUE ?
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A．Ten new concrete bridges have already been built in the United States . |
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B．A new concrete bridge could last 50 more years than an ordinary concrete one . |
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C．People didn’t know how to build with cement until the late 1800s . |
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D．Water and salt won’t do any damage to bridges over time . |
4.What does the passage mainly tell us ?
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A．The causes of road accidents . |
B．The advantages of fly ash |
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C．The measures of avoiding road accidents |
D．Latest information about long-life concrete bridges |