America’s greatest technological achievement, the Hoover Dam, now has a companion piece, a bridge held up by the longest arch in the Western Hemisphere（半球）. The Mike O’Callaghan-Pat Tillman Memorial Bridge, which opened this month and connects the U.S. states of Arizona and Nevada, crosses the vast chasm（峡谷）890 feet above the Colorado River that is controlled by the dam.
The striking 1,900-foot-long structure will improve traffic in the region and help protect the dam from being destroyed. It is the seventh highest bridge in the world, behind four in China, one in Papua New Guinea and one in the US state of Colorado.
“The Hoover Dam is the greatest civil engineering achievement in America’s history,” said the bridge project manager Dave Zanatell. “Our goal was not to outdo or outshine it. Our goal was to, in a respectful way, do something that would be great for our generation and that would stand besides Hoover Dam in a respectful and quality way that would become a part of Hoover’s legacy（遗产）.”
Just as the Hoover Dam was built in the heart of the Great Depression（大萧条）and was seen as an example of the nation’s can-do spirit, some hope this project can also provide some uplift.
The bridge is surprising: at 1,050 feet, its support arch holds up a roadway that lies on 300-foot-long concrete pillars（柱子）, some of the tallest in the world. It contains 16 million pounds of steel.
The idea of the bridge came into being in the 1960s because the top of the Hoover Dam has been a narrow two-lane road that is the fastest route from Arizona to Las Vegas and then the Pacific Northwest and Canada.
Access to the dam from each direction is a dangerously winding route, but massive trucks and passenger vehicles shared it for decades. During the day, when thousands of tourists travel to the dam from Las Vegas three times as many accidents as on a normal road will happen.
The bridge has a sidewalk on the side facing the dam. The wall on both sides is 54 inches high, so walkers can take photos there.Which of the following is true of the Hoover Dam?
| A．It was completed recently. |
| B．It was built during the hard times. |
| C．It has the longest arch. |
| D．It’s the seventh highest dam in the world. |
What is one of the purposes of building the bridge?
| A．To protect the dam. | B．To save the cultures. |
| C．To outdo the dam. | D．To develop the tourism. |
The underlined word “uplift” in Paragraph 4 means _____.
| A．lift of the heavy object | B．support in money |
| C．spiritual encouragement | D．instruction in technology |
Which of the followings shows the right position of the bridge and dam?
The text is mainly about ______.
| A．the Hoover Dam |
| B．American western development |
| C．a tour along the Colorado River |
| D．a recently built bridge |
The question of whether our government should promote science and technology or the liberal arts(文科) in higher education isn’t an either/or proposition(命题), although the current emphasis on preparing young Americans for STEM（science, technology, engineering, maths）-related fields can make it seem that way.
The latest congressional report acknowledges the critical importance of technical training, but also states firmly that the study of the humanities and social sciences must remain central components of America’s educational system at all levels. Both are critical to producing citizens who can participate effectively in our democratic society, become creative leaders, and benefit from the spiritual enrichment that the reflection on the great ideas of mankind over time provides.
Parents and students who have invested heavily in higher education worry about graduates’ job prospects as technological advances and changes in domestic and global markets transform professions in ways that reduce wages and cut jobs. Under these circumstances, it’s natural to look for what may appear to be the most “practical” way out of the problem “Major in a subject designed to get you a job” seems the obvious answer to some, though this ignores the fact that many disciplines in the humanities characterized as “soft” often, in fact, lead to employment and success in the long run. Indeed, according to surveys, employers have expressed a preference for students who have received a broadly-based education that has taught them to write well, think critically, research creatively, and communicate easily.
Moreover, students should be prepared not just for their first job, but for their 4th and 5th jobs, as there’s little reason to doubt that people entering the workforce today will be called upon to play many different roles over the course of their careers. The ones who will do the best in this new environment will be those whose educations have prepared them to be flexible. The ability to draw upon every available tool and insight--picked up from science, arts, and technology--to solve the problems of the future, and take advantage of the opportunities that present themselves, will be helpful to them and the United States.What does the latest congressional report suggest________?
| A．STEM-related subjects help students find jobs in the information society. |
| B．Higher education should be adjusted to the practical needs of society. |
| C．The liberal arts in higher education help enrich students’ spiritual life. |
| D．The humanities and STEM subjects should be given equal importance. |
What kind of job applicants do employers look for_______?
| A．Those who have a strong sense of responsibility. |
| B．Those who are good at solving practical problems. |
| C．Those who are likely to become innovative leaders. |
| D．Those who have received an all-round education. |
What advice does the author give to college students________?
| A．Seize opportunities to explore their potential. |
| B．Try to take a variety of practical courses. |
| C．Adopt a flexible approach to solving problems. |
| D．catch as many chances as possible to change their jobs. |
Energy independence has a nice ring to it. Doesn’t it? If you think so, you’re not alone, because energy independence has been the dream of American president for decades, and never more so than in the past few years, when the most recent oil price shock has been partly responsible for kicking off the great recession.
“Energy independence” and its rhetorical (修辞的) companion “energy security” are, however, slippery concepts that are rarely though through. What is it we want independence from, exactly?
Most people would probably say that they want to be independent from imported oil. But there are reasons that we buy all that old from elsewhere.
The first reason is that we need it to keep our economy running. Yes, there is a trickle（涓涓细流）of biofuel（生物燃料）available, and more may become available, but most biofuels cause economic waste and environmental destruction.
Second, Americans have basically decided that they don’t really want to produce all their own oil. They value the environmental quality they preserve over their oil imports from abroad. Vast areas of the United States are off-limits to oil exploration and production in the name of environmental protection. To what extent are Americans really willing to endure the environmental impacts of domestic energy production in order to cut back imports?
Third, there are benefits to trade. It allows for economic efficiency, and when we buy things from places that have lower production costs than we do, we benefit. And although you don’t read about this much, the United States is also a large exporter of oil products, selling about 2 million barrels of petroleum products per day to about 90 countries.
There is no question that the United States imports a great deal of energy and, in fact, relies on that steady flow to maintain its economy. When that flow is interrupted, we feel the pain in short supplies and higher prices. At the same time, we obtain massive economic benefits when we buy the most affordable energy on the world market and when we engage in energy trade around the world.What does the author say about energy independence for America?
| A．It sounds very attractive. |
| B．It ensures national security. |
| C．It will bring oil prices down |
| D．It has long been everyone’s dream. |
Why does America rely heavily on oil imports?
| A．It wants to expand its storage of crude oil(原油). |
| B．Its own oil reserves are quickly running out. |
| C．It wants to keep its own environment undamaged. |
| D．Its own oil production falls short of demand. |
What does the author say about oil trade?
| A．It proves profitable to both sides. |
| B．It improves economic efficiency. |
| C．It makes for economic prosperity. |
| D．It saves the cost of oil exploration. |
Chimpanzees, long considered reluctant to share, apparently can display selfless tendencies, revealing one more key way our closest living relatives are like humans, scientists find. These findings could shed light on the evolution of altruism in humans.
Previously, a belief was widely held that human altruism evolved only after humans split from their ape cousins about 6 million years ago. In recent years, however, research has revealed just how much chimpanzees have in common with us. They can hunt with spears, play with dolls and mourn their partners’ death.
"Most of the earlier studies had presented the apes with a complex implement that helped them deliver food to themselves or others, often so complicated that the experiments tested tool skills rather than social tendencies," De Waal told Live Science. "Ours is the first study that uses no such implement at all."
In addition to using complex food-delivery systems, past experiments often placed the chimpanzees so far apart that they might not have realized how their actions benefited others. In these new, simplified experiments, two apes were housed next to each other with a screen through which they could see each other. Then, one chimpanzee had to choose between two differently colored tokens (币) from a bin, one of which represented a pro-social (亲社会的) option, the other a selfish option. The pro-social option would cause both chimpanzees to receive a piece of banana wrapped in paper. The selfish option only rewarded the ape who made the choice.
In a study with seven adult female chimps placed into various pairs, the scientists found all the apes showed a definite preference for the pro-social option. "For me, the most important finding is that like us, chimpanzees take into account the needs and wishes of others," researcher Victoria Horner, said.
The chimpanzees behaved especially altruistically toward partners who either patiently waited or gently reminded them that they were there by drawing attention to themselves. They were less likely to reward partners who pressured through making a fuss, begging persistently or spitting water at them. This is opposite to a long-standing view that the chimpanzees only share food under pressure.The word "altruism" (paragraph 1) is closest in meaning to ______.
| A．selfishness | B．selflessness |
| C．willingness | D．reluctance |
Recent researches are performed with less complicated implements mainly to ______.
| A．show that chimps are only good at using implements |
| B．see whether chimps are willing to share food with others |
| C．find out if chimps are likely to reward partners |
| D．test chimps’ social tendencies instead of tool skills |
Which of the following might be the best title of the passage?
| A．Evolution History of Altruism in Humans |
| B．Similarities between Chimps and Mankind |
| C．Chimps Do Show Selfless Behavior |
| D．Chimps Only Share Food under Pressure |
Many theories regarding the causes of juvenile delinquency (crimes committed by young people) focus either on the individual or on society as the major contributing influence. Theories on the individual suggest that children criminal behavior before they were not sufficiently for previous misbehaviors or that they have learned criminal behavior through interaction with others. Theories focusing on the role of society suggest that children commit crimes in to their failure to rise above their socioeconomic status or as a rejection of middle-class values.
Most theories of juvenile delinquency have focused on children from families, the fact that children from wealthy homes also commit crimes. The latter may commit crimes for lack of adequate control from parents. All , however, are uncertain or unimproved and are of course challenged with criticism.
Changes in the social structure may indirectly juvenile crime rates. For example, changes in the economy that to fewer job opportunities for youth and rising unemployment make gainful employment increasingly difficult to obtain. This results in among youths and may in lead more youths into criminal behavior.
Families have also experienced these years. More families consist of one parent households or two working parents; , children are likely to have less supervision at home than was common in the traditional family . This lack of parental supervision is thought to be an influence on juvenile crime rates. Other noticeable of offensive acts include experience or failure in school, the availability of drugs and alcohol, and the growing phenomenon of child abuse and child neglect. All these conditions tend to increase the of a child committing a criminal act, a direct cause and effect relationship has not yet been established.
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With the World Cup always held in the European off-season in June and July, when the tiny nation of Qatar beat out USA Australia, Japan and South Korea, as the venue（地点）of the 2022 World Cup Soccer, there were gasps of surprise from the fans – it was not just because of the size of the competitors, but also the fact that Doha sees an average top temperature of 41 degrees Celsius in June and July with the possibility of top temperatures as high as 50°C.
Since the World Cup cannot be moved to the ‘cooler’ season in January or to a neighboring country with milder weather, Qatar has to figure out a solution to make the game more comfortable. A team of engineering scientists from Qatar University (QU) have taken a more high-tech approach to solving the problem – they've reportedly developed a type of artificial "cloud" designed to float above the World Cup venues and provide fans and players with relief from the blazing sun.
The artificial clouds system was invented by a team led by Dr Saul Abdul Ghani, Head of the Mechanical and Industrial Engineering Department at QU, who told Gulf News that the "clouds" would be made from a lightweight carbon structure carrying a giant envelope of material containing helium（氦）gas. The "cloud" would also feature solar panels on its upper surface to power engines that allow the cloud to be moved via remote control. While the country officials have promised to improve some of the issues with solar-powered stadiums capable of reducing the temperatures inside, to a comfortable 20℃, there is still concern of how the players will be able to function in the practice fields.
The system would initially cost around US$500,000, with prices coming down with commercial scale production. However, since Qatar needs to find a solution, the money is probably to the issue. The bigger question is, will this team of scientists actually be able to conjure up（兑现）something that they have promised? We will all find out in about eleven years!By mentioning “the European off-season”, the author tells us .
| A．why the World Cup is held |
| B．where the host countries of the World Cup are |
| C．where the World Cup is usually held |
| D．when the World Cup is held |
The artificial clouds system aims to .
| A．carry a giant envelope of material containing helium gas |
| B．air-condition the venues via artificial cloud system |
| C．feature solar panels on its upper surface |
| D．allow the cloud to be moved via remote control |
Which of the following is NOT promised for 2022 World Cup by Qatar?
| A．The tournament season. |
| B．The tournament venues. |
| C．The comfortable temperature for training grounds. |
| D．The comfortable temperature for the matches. |
About how much US dollars are estimated if four artificial clouds float above stadiums?
| A．$ 1,600,000 | B．$ 2,500,000 |
| C．$500,000 | D．$ 2,200,000 |
Which of the following can best serve as the title of this passage?
| A．Will the 2020 World Cup Be Held in the Middle East? |
| B．Qatar’s 2022 World Cup in High Temperature |
| C．Will Man-Made Clouds Provide Shade at the 2022 World Cup in Qatar? |
| D．Artificial Clouds at High Cost Promising Comfortable Season |
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