Labor force is defined as being the total number of people who are available to work and earn income. This definition includes everyone who is employed or seeking paid employment, so it includes employers and the self-employed. Labor is one of the country's resources which can be combined with other resources to produce the goods and services wanted by the community.
Although the size of the workforce depends a great deal on the size of the total population, there are several other influences which also affect it. The age distribution (分布) of the total population has a very marked effect on the available workforce. If the population has a high proportion of very young people or of those too old to work, then the available workforce would be lower than if there were a balanced spread age distribution. If the population naturally grows rapidly, the number of births greatly exceeds (超出) the number of deaths then as a total population increases proportion of the workforce declines.
Sometimes a po
pulation is described as aging which means that the birth rate is either falling or growing very slowly, and as people retire from the workforce there are insufficient numbers of young people entering it to replace those who are leaving it. In that situation the population is top-heavy with older people. So the percentage of the population in the workforce declines when there is either a rapid increase in births or a falling birth rate.
The age distribution of the population has several important effects on the economy. If the population is aging and there is an increase in the number of people retiring without a corresponding increase in the number entering the workforce, this raises the problem of the ability of the economy to provide a reasonable level of social services to the retired group. If the aged are to be cared for in special homes, finance must be available for that purpose. If the size of the workforce is small relative to the total population, then the government tax revenue (税收) is relatively low and either the government has less money available to it or the workforce members have to be taxed more heavily. In the passage “labor
force” is defined as ___________.
| A．people who are available to work and earn income |
| B．self-employed people only |
| C．people who are looking for an employment |
| D．employers who create job opportunities |
The conclusion which can be drawn from the second paragraph is that___________.
| A．a natural growth of population leads to a balanced workforce |
| B．a large population does not necessarily mean a higher proportion of workforce |
| C．the larger the population, the higher the proportion of the workforce |
| D．the workforce will be lower, if the population has a balanced age distribution， |
When a population is said to be aging，___________.
| A．there are more people retiring than those entering the workforce |
| B．the birth rate must be growing |
| C．there should be an oversupply of workforce |
| D．There are more people entering the workforce than those retiring |
The population which is top-heavy with older people ___________ of a country.
| A．leads to the high rate of unemployment |
| B．results in low tax on the workforce members |
| C．affects employees’ incomes |
| D．places pressure on the economy |
Thirteen vehicles lined up last March to race across the Mojave Desert, seeking a million in prize money. To win, they had to finish the 142-mile race in less than 10 hours. Teams and watchers knew there might be no winner at all, because these vehicles were missing a key part －drivers.
DARPA, the Defense Advanced Research Projects Agency, organized the race as part of a push to develop robotic vehicles for future battlefields. But the Grand Challenge, as it was called, just proved how difficult it is to get a car to speed across an unfamiliar desert without human guidance. One had its brake lock up in the starting area. Another began by throwing itself onto a wall. Another got tied up by bushes near the road after 1.9 miles.
One turned upside down. One took off in entirely the wrong direction and had to be disabled by remote (远距离的) control. One went a little more than a mile and rushed into a fence; another managed to go for six miles but stuck on a rock. The “winner,” if there was any, reached 7.8 miles before it ran into a long, narrow hole, and the front wheels caught on fire.
“You get a lot of respect for natural abilities of the living things,” says Reinhold Behringer, who helped design two of the car-size vehicles for a company called Sci-Autonics. “Even ants (蚂蚁) can do all these tasks effortlessly . It’s very hard for us to put these abilities into our machines.”
The robotic vehicles, though with necessary modern equipment such as advanced computers and GPS guidance, had trouble figuring out fast enough the blocks ahead that a two-year-old human recognizes immediately, Sure, that very young child, who has just only learned to walk, may not think to wipe apple juice off her face, but she already knows that when there’s a cookie in the kitchen she has to climb up the table, and that when she gets to the cookie it will taste good. She is more advanced, even months old, than any machine humans have designed.Watchers doubted if any of the vehicles could finish the race because .
| A．they did not have any human guidance |
| B．the road was not familiar to the drivers |
| C．the distance was too long for the vehicles |
| D．the prize money was unattractive to the drivers |
DARPA organized the race in order to .
| A．raise money for producing more robotic vehicles |
| B．push the development of vehicle industry |
| C．train more people to drive in the desert |
| D．improve the vehicles for future wars |
From the passage we know “robotic vehicles” are a kind of machines that .
| A．can do effortlessly whatever tasks living thing can |
| B．can take part in a race across 142 miles with a time limit |
| C．can show off their ability to turn themselves upside down |
| D．can move from place to place without being driven by human beings |
In the race, the greatest distance one robotic vehicle covered was .
| A．about eight miles | B．six miles |
| C．almost two miles | D．about one mile |
In the last paragraph, the writer implies that there is a long way to go .
| A．for a robotic vehicle to finish a 142-mile race without any difficulties |
| B．for a little child who has just learned to walk to reach the cookie on the table |
| C．for a robotic vehicle to deal with a simple problem that a little child can solve |
| D．for a little child to understand the importance of wiping apple juice off its face |
MONTREAL (Reuters) – Crossing the US-Canada border（边界）to go to church on a Sunday cost a US citizen ＄10,000 for breaking Washington’s strict new security（安全）rules.
The expensive trip to church was a surprise for Richard Albert, who lives right on the Canadian border. Like the other half-dozen people of Township 15, crossing the border is a daily occurrence for Albert. The nearby Quebec village of St. Pamphile is where they shop, eat and go to church.
There are many such situations in these areas along the largely unguarded 5,530-mile border between Canada and the US-which in some cases actually runs down the middle of streets or through buildings.
As a result, Albert says he did not expect any problems three weeks ago when he returned home to the US after attending church in Canada, as usual. The US customs（海关）station in this area is closed on Sundays, so be just drove around the locked gate, as he had done every weekend since the gate appeared last May, following a tightening of border security. Two days later. Albert was told to go to the customs office, where an officer told him be had been caught on carnera crossing the border illegally（非法）.
Ottawa has given out special passes to some 300 US citizens in that area so they can enter the country when Canadian customs stations are closed, but the US stopped a similar program last May. That forces the people to a 200-mile detour along hilly roads to get home through another border checkpoint.
Albert has requested that the customs office change their decisions on the fine, but he has not attended a Sunday church since. “I feel like I’m living in a prison,” he said.We learn from the text that Richard Albert is .
| A．an American living in Township 15 | B．a Canadian living in a Quebec village |
| C．a Canadian working in a customs station | D．an American working in a Canadian church |
Albert was fined because he .
| A．failed to obey traffic rules | B．broke the American security rules |
| C．worked in St. Pamphile without a pass | D．damaged the gate of the customs office |
The underlined word “detour” in paragraph 5 means .
| A．a drive through the town | B．a race across the fields |
| C．a roundabout way of travelling | D．a journey in the mountain area |
What would be the best title for the text?
| A．A Cross-country Trip | B．A Special Border Pass |
| C．An Unguarded Border | D．An Expensive Church Visit |
Three months after the government stopped issuing（发放）or renewing permits for Internet cafes because of security（安全）concerns, some cafe owners are having financial（经济的）concerns of their own.
The permits were stopped suddenly three months ago by the government until new safeguards could be put in place to prevent misuse of the information superhighway, but for cafe owners it’s a business breakdown with no fix in sight.
“I handed in a request to open up an Internet cafe and received the conditions,” said the businessman Obeidallah. “I rented a place in the Sharafiah district at SR45,000 and prepared the place with equipment that cost me more than SR100,000. When I went to the local government after finishing everything, I was surprised to find that they’d stopped issuing permits for Internet cafes.”
Having an Internet cafe without Internet is much like having a coffee shop without coffee.“I’m avoiding closing the place, but it’s been more than three months with the situation ongoing as it is.” Obeidallah said. “Who will bear the losses caused by the permit issue?”
The decision took many cafe owners by surprise. “I asked to open an Internet cafe, and I was handed a list of all the things that were needed to follow through, such as a sign for the place, filling out forms,” said Hassan Al-Harbi.
“I did all that was asked and rented a place. And after the Haj vacation I went to the local government and they surprised me, saying that there are new rules that forbid the issuing of any more Internet cafe permits and that one can’t even renew his permit. I’ve lost more than SR80,000,” Al-harbi added.
As for the government, officials say a method to deal with it is on the way. But security concerns come before profit（盈利）.The government stopped issuing or renewing permits for Internet cafes .
| A．to prevent misuse of new safeguards in Internet cafes |
| B．to make cafe owners earn less profit from their business |
| C．to stop the use of the information superhighway on Internet |
| D．to make sure of the proper use of the information superhighway |
The government’s decision led to the fact that many cafe owners .
| A．suffered heavy financial losses |
| B．asked to open up Internet cafes |
| C．continued to operate Internet cafes |
| D．asked the government for payment |
The underlined phrase in the last paragraph “on the way” means .
| A．to be studied |
| B．to be put into practice |
| C．to be changed |
| D．to be improved |
The cafe owners found the government’s decision .
| A．surprising and unacceptable |
| B．understandable and acceptable |
| C．reasonable but surprising |
| D．surprising but acceptable |
Across the world, 1.1 billion people have no access to clean drinking water. More than 2.5 billion people lack basic sanitation.(卫生设备)
The combination proves deadly. Each year, diseases related to inadequate water and sanitation kill between 2 and 5 million people and cause an estimated 80 percent of all sicknesses in the developing world. Safe drinking water is a precondition for health and the fight against child death rate, inequality between men and women, and poverty.
Consider these facts:
●The average distance that women in Africa and Asia walk to collect water is 6 kilometers.
●Only 58 percent of children in sub-Saharan Africa are drinking safe water. and only 37 percent of children in South Asia have access to even a basic toilet.
●Each year in India alone, 73 million working days are lost to water-borne diseases.
Here are three ways you can help:
1)Write Congress
Current U.S. foreign aid for drinking water and sanitation budgets only one dollar peryear per American citizen. Few members of Congress have ever received a letter from voters about clean drinking water abroad.
2)Sponsor a project with a faith-based organization
Many U.S. religious groups already sponsor water and sanitation projects, working with partner organizations abroad. Simply put a single project by a U.S. organization can make safe water a reality for thousands of people.
3)Support nonprofit water organizations
Numerous U.S.-based nonprofits work skillfully abroad in community-led projects related to drinking water and sanitation. Like the sample of non-profits noted as follows, some organizations are large, other small-scale, some operate worldwide, others are devoted to certain areas in Africa, Asia, or Latin America. Support them generously.The three facts presented in the passage are used to illustrate that________.
| A．poverty can result in water-borne diseases |
| B．people have no access to clean drinking water |
| C．women’s rights are denied in some developing countries |
| D．safe drinking water should be a primary concern |
The intended readers of the passage are________.
| A． Americans |
| B．overseas sponsors |
| C． Congressmen |
| D． U.S.-based water organizations |
The main purpose of the passage is to call on people to _________.
| A．get rid of water-related diseases in developing countries |
| B．donate money to people short of water through religious groups |
| C．fight against the worldwide water shortage and sanitation problem |
| D．take joint action in support of some nonprofit water organizations |
What information will probably be provided following the last paragraph?
| A．A variety of companies and their worldwide operation. |
| B．A list of nonprofit water organizations to make contact with. |
| C．Some ways to get financial aids from U.S. Congress. |
| D．A few water resources exploited by some world-famous organizations. |
Although man has known asbestos for many hundreds of years, it was not until 160 years ago that it was mined for the first time on the North American continent. H. W. Johns, owner of a New York City Supply Shop for roofers, was responsible for(对…负责) the opening of that first mine.
Mr. Johns was given a piece of asbestos which had been found in Italy. He experimented with the material and then showed its surprising powers to his customers. After putting on a pair of asbestos gloves, which looked much like ordinary work gloves, he took red-hot coals from the fireplace and played with them in his hands. How astonished the customers were to discover that he was not burned at all. You can well imagine that he had increasing business in asbestos roofing materials. However, because it was very expensive to transport (carry) them from Italy to the United States, Mr. Johns sent out a young scientist to seek a source nearer home. This young man found great vein(岩脉), in the province of Quebec in Canada.
Ever since 1881 Quebec has led the world in the production of this unusual mineral, which is made up of magnesium, silicon, iron, and oxygen. When it is mined, the asbestos is heavy, just as you would expect a mineral to be. When it is separated, a strange thing happens; the rock breaks down into fine, soft, soapy fibres(纤维).
Scientists do not know why the rock can be separated easily into threads(线), but they have found thousands of uses of this fireproof material, of the so-called “cloth of stone”.Which title best expresses the main idea of this passage?
| A．Asbestos mined in Canada | B．Fireproof matter |
| C．A “wonder” mineral | D．A new roofing material |
Johns proved his ability as a salesman by_______.
| A．going into roofing business | B．carrying asbestos from Italy |
| C．sending a trained scientist | D．showing the use of asbestos gloves |
Which is the most important character of asbestos that the author wants to show us?
| A．It is like thread. | B．It feels soapy. |
| C．It burns easily. | D．It is unusually heavy. |
The author’s main purpose in writing this passage was to _______.
| A．show the need for more scientists |
| B．compare asbestos with other minerals |
| C．increase the sales of asbestos |
| D．present facts about asbestos |