Because two-thirds of the country dry and desert, today about 85% of the Australian population of 20 million in the six major cities around the coast. A．is; live B．is; lives C．are; lives D．are; li 题目和参考答案——青夏教育精英家教网—

题目内容

Because two-thirds of the country ______ dry and desert, today about 85% of the Australian population of 20 million ______ in the six major cities around the coast.

A．is; live B．is; lives C．are; lives D．are; live

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The storage of classified (分类的) research at all 24 labs run by the US Department of Energy was shut down this week after officials decided that the security (安全) problems recently found at the Los Alamos National Laboratory in New Mexico might also exist elsewhere.

Several computer disks went missing at Los Alamos earlier this month, forcing Energy Secretary Spencer Abraham to stop all work at the lab until the problems are found out. As of 26 July, two missing disks had still not been found, and 15 employees had been suspended in connection with the disappearance.

Now all energy labs will stop doing classified research that involves(需要) removable storage devices --- such as computer disks --- until all the devices are given explanation for and new procedures are in place for monitoring their handling by laboratory employees.

"While we have no evidence that the problems being investigated are present elsewhere, we have a responsibility to take all necessary action to prevent such problems, "Abraham said on 23 July.

The shut-down isn't quite as dramatic（惊人的）as it sounds, experts say. Only two labs will be seriously affected: Sandia National Laboratories in Albuquerque, New Mexico, and Lawrence Livermore National Laboratory in California. Together with Los Alamos, these two labs conduct the most part of the country's nuclear weapon programmes. At Livermore, 876 employees will be suspended during the storage of some 12,000 items of classified removable material.

At other labs, far fewer people will be affected. "The impact (影响) should be the smallest," says Martha Krebs, former director of the energy department's science office.

Why was the storage of classified research at all 24 labs shut down?

A. Because the security problems might be present elsewhere.

B. Because the security problems existed elsewhere.

C. Because two missing computer disks had still not be found.

D. Because officials decided to stop doing such research.

How many labs conduct the country's nuclear weapon programmes according to the text?

A. About 24. B. Only 2. C. More than 2. D. Over 15.

The underlined word "suspended"in the second paragraph probably means "______”.

A. hung from above B. stopped from holding a position C. doubted D. fired

It can be inferred from the text that _____.

A. the computer disks must have been stolen by terrorists

B. the people living in the United States have little security

C. the United States is a country whose security is very bad

D. the missing of the computer disks caused great fear among Americans

The city council asked for offers to remove the bushes. The lowest bid they received was $50,000-----and that was if the city provided breakfast and lunch for the workers for thr six weeks it would take to clear the overgrown area. The city only wanted to give unlimited coffee and a piece of bread a day for each person. When that offer was rejected, the city asked for help on its website.

A sheepherder（养绵羊的人） in Montanta and a goatherder（养山羊的人） in San Bernardino read about the city’s plight （困境）while surfing the Web on their laptops. They both offered to do the job for $25,000. The council chosed the goatherder because he lived closer. When he was told that the city dump（垃圾场） was overflowing , the gotherder said, “No problem. My goats will eat everything in your dump, except the car engines, of course.” So ,for another $5,000, the city killed two birds with one stone. If all goes well, they will invite the goatherder and his “family” back every three years. The goatherder said that he would probably visit San Diego while his goats were in the dump. “I want to go there by plane, I just hope we don’t crash. My goats will miss me a lot.” He said.

Why did the city council want to remove the bush?

A. Because the fires in hillborbough destroyed 30 homes.

B. Because people wanted to build their homes there.

C. Because the overgrown bushes could cause fires again.

D.Because two sheeherder offered to do the job.

The goatherder was chosen to do the job because

A. He offered to do it for the lower price

B. It was easier to transport his goat

C. Goats can do the job better than the job

D. The city wanted to raise more goats

According to the passage,

A. the sheepherder offered to do the job for $50.000

B. the lowest bid to remove the bushes was $50,000

C. the sheepherder and the goatherder were both addicted to surfing the Internet.

D. hiring goats to do the job saved the government lots of money.

we can infer from the passage that

A. the city will remove the bushes in this area regularly

B. the goatherder asked for $50,000 to kill the birds with stones.

C. the goatherder was invited to San Diego to do some sightseeing.

D. the city council was not kind to the people who worked for it.

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 .
【小题1】Why did the United Nations launch the campaign ?

A．Because the United Nations wanted to reduce road accidents and economic costs

B．Because two million people were killed in the accidents .

C．Because engineers wanted to design ten new concrete mixtures .

D．Because the United Nations made bridges of the new mixtures which could last for about 20 to 35

years .
【小题2】What does the underlined word “ this ” in the sixth paragraph refer to ?

【小题3】Which of the following statements is TRUE ?

A．Ten new concrete bridges have already been built in the United States .

B．A new concrete bridge could last 50 more years than an ordinary concrete one .

C．People didn’t know how to build with cement until the late 1800s .

D．Water and salt won’t do any damage to bridges over time .

【小题4】What does the passage mainly tell us ?

A．The causes of road accidents .	B．The advantages of fly ash
C．The measures of avoiding road accidents	D．Latest information about long-life concrete bridges

Goats are being hired to do the work of people near SanDiego. The fires that occurred in Hillborbough four years ago destroyed thirty homes, most of which have been rebuilt. While people were rebuilding the homes, the grasses and bushes were growing back. The area is now so overgrown in bushes that there is again a major danger of fire.
The city council asked for offers to remove the bushes. The lowest bid they received was $50,000-----and that was if the city provided breakfast and lunch for the workers for thr six weeks it would take to clear the overgrown area. The city only wanted to give unlimited coffee and a piece of bread a day for each person. When that offer was rejected, the city asked for help on its website.
A sheepherder（养绵羊的人） in Montanta and a goatherder（养山羊的人） in San Bernardino read about the city’s plight （困境）while surfing the Web on their laptops. They both offered to do the job for $25,000. The council chosed the goatherder because he lived closer. When he was told that the city dump（垃圾场） was overflowing , the gotherder said, “No problem. My goats will eat everything in your dump, except the car engines, of course.” So ,for another $5,000, the city killed two birds with one stone. If all goes well, they will invite the goatherder and his “family” back every three years. The goatherder said that he would probably visit San Diego while his goats were in the dump. “I want to go there by plane, I just hope we don’t crash. My goats will miss me a lot.” He said.
【小题1】Why did the city council want to remove the bush?

A．Because the fires in hillborbough destroyed 30 homes.

B．Because people wanted to build their homes there.

C．Because the overgrown bushes could cause fires again.

D．Because two sheeherder offered to do the job.

【小题2】The goatherder was chosen to do the job because

A．He offered to do it for the lower price

B．It was easier to transport his goat

C．Goats can do the job better than the job

D．The city wanted to raise more goats

【小题3】According to the passage,

A．the sheepherder off

ered to do the job for $50.000

B．the lowest bid to remove the bushes was $50,000

C．the sheepherder and the goatherder were both addicted to surfing the Internet.

D．hiring goats to do the job saved the government lots of money.

【小题4】 we can infer from the passage that

A．the city will remove the bushes in this area regularly

B．the goatherder asked for $50,000 to kill the birds with stones.

C．the goatherder was invited to San Diego to do some sightseeing.

D．the city council was not kind to the people who worked for it.

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【小题1】The above is most probably________．