Some scientists say that animals in the oceans are increasingly threatened by noise pollution caused by human beings.
The noise that affects sea creatures comes from a number of human activities. It is caused mainly by industrial underwater explosions, ocean drilling, and ship engines. Such noises are added to natural sounds. These sounds include the breaking of ice fields, underwater earthquakes, and sounds made by animals themselves.
Decibels (分贝) measured in water are different from those measured on land. A noise of one hundred and twenty decibels on land causes pain to human ears. In water, a decibel level of one hundred and ninety-five would have the same effect.
Some scientists have suggested setting a noise limit of one hundred and twenty decibels in the oceans. They have observed that noises at that level can frighten and confuse whales (鲸).
A team of American and Canadian scientists discovered that louder noises can seriously injure some animals.
The research team found that powerful underwater explosions were causing whales in the area to lose their hearing. This seriously affected the whales’ ability to exchange information and find their way. Some of the whales even died. The explosions had caused their ears to bleed and become infected (被感染的).
Many researchers whose work depends on ocean sounds are against a limit of one hundred and twenty decibels. They say such a limit would mean an end to important industrial and scientific research.
Scientists do not know how much and what kinds of noises are harmful to ocean animals. However, many scientists don’t think that noise is a greater danger than they believed. They want to prevent noises from harming creatures in the ocean.According to the passage, Which of the following is increasingly dangerous to sea creatures?
| A．The sound of cars. | B．The sound of voices. |
| C．Man-made noise pollution. | D．The sound of steps. |
According to the passage, natural sounds include all of the following except ________.
| A．sounds made by animals themselves |
| B．ocean drilling |
| C．underwater earthquakes |
| D．the breaking of ice fields |
Which of the following is discussed in the third paragraph?
| A．The same noise level produces a different effect on land and in the ocean. |
| B．Different places may have different types of noises. |
| C．The decibel is not a right unit (单位) for measuring underwater noise. |
| D．Different ocean animals may have different reactions to noises. |
What can we learn about the whales from the passage?
| A．They won’t be confused by noises. |
| B．They are deaf to noises. |
| C．Their ability to reproduce will be lowered by high-level noises. |
| D．Their hearing will be damaged by high-level noises. |
C
Suppose you become a leader in an organization. It’s very likely that you’ll want to have volunteers to help with the organization’s activities. To do so, it should help to understand why people undertake volunteer work and what keeps their interest in the work.
Let’s begin with the question of why people volunteer. Researchers have identified several factors that motivate people to get involved. For example, people volunteer to express personal values related to unselfishness, to expand their range of experiences, and to strengthen social relationships. If volunteer positions do not meet these needs, people may not wish to participate. To select volunteers, you may need to understand the motivations of the people you wish to attract.
People also volunteer because they are required to do so. To increase levels of community service, some schools have launched compulsory volunteer programs. Unfortunately, these programs can shift people’s wish of participation from an internal factor (e.g., “I volunteer because it’s important to me”) to an external factor (e.g., “I volunteer because I’m required to do so”). When that happens, people become less likely to volunteer in the future. People must be sensitive to this possibility when they make volunteer activities a must.
Once people begin to volunteer, what leads them to remain in their positions over time? To answer this question, researchers have conducted follow-up studies in which they track volunteers over time. For instance, one study followed 238 volunteers in Florida over a year. One of the most important factors that influenced their satisfaction as volunteers was the amount of suffering they experienced in their volunteer positions. Although this result may not surprise you, it leads to important practical advice. The researchers note that attention should be given to “training methods that would prepare volunteers for troublesome situations or provide them with strategies for coping with the problem they do experience”.
Another study of 302 volunteers at hospitals in Chicago focused on individual differences in the degree to which people view “volunteer” as an important social role. It was assumed that those people for whom the role of volunteer was most part of their personal identity would also be most likely to continue volunteer work. Participants indicated the degree to which the social role mattered by responding to statements such as “Volunteering in Hospital is an important part of who I am.” Consistent with the researchers’ expectations, they found a positive correlation (正相关) between the strength of role identity and the length of time people continued to volunteer. These results, once again, lead to concrete advice: “Once an individual begins volunteering, continued efforts might focus on developing a volunteer role identity.... Items like T-shirts that allow volunteers to be recognized publicly for their contributions can help strengthen role identity”.People volunteer mainly out of ______ .
| A．academic requirements | B．social expectations |
| C．financial rewards | D．internal needs |
What can we learn from the Florida study?
| A．Follow-up studies should last for one year. |
| B．Volunteers should get mentally prepared. |
| C．Strategy training is a must in research. |
| D．Volunteers are provided with concrete advice. |
What is most likely to motivate volunteers to continue their work?
| A．Individual differences in role identity. |
| B．Publicly identifiable volunteer T-shirts. |
| C．Role identity as a volunteer. |
| D．Practical advice from researchers. |
What is the best title of the passage?
| A．How to Get People to Volunteer |
| B．How to Study Volunteer Behaviors |
| C．How to Keep Volunteers’ Interest |
| D．How to Organize Volunteer Activities |
In the United States alone, over 100 million cell-phones are thrown away each year. Cell-phones are part of a growing mountain of electronic waste like computers and personal digital assistants. The electronic waste stream is increasing three times faster than traditional garbage as a whole.
Electronic devices contain valuable metals such as gold and silver. A Swiss study reported that while the weight of electronic goods represented by precious metals was relatively small in comparison to total waste, the concentration (含量) of gold and other precious metals was higher in So-called e-waste than in naturally occurring minerals.
Electronic wastes also contain many poisonous metals. Even when the machines are recycled and the harmful metals removed, the recycling process often is carried out in poor countries, in practically uncontrolled ways which allow many poisonous substances to escape into the environment.
Creating products out of raw materials creates much more waste material, up to 100 times more, than the material contained in the finished products. Consider again the cell-phone, and imagine the mines that produced those metals, the factories needed to make the box and packaging(包装) it came in. Many wastes produced in the producing process are harmful as well.
The U.S. Environmental Protection Agency notes that most waste is dangerous in that "the production, distribution, and use of products - as well as management of the resulting waste - all result in greenhouse gas release." Individuals can reduce their contribution by creating less waste at the start - for instance, buying reusable products and recycling.
In many countries the concept of extended producer responsibility is being considered or has been put in place as an incentive (动机) for reducing waste. If producers are required to take back packaging they use to sell their products, would they reduce the packaging in the first place?
Governments' incentive to require producers to take responsibility for the packaging they produce is usually based on money. Why, they ask, should cities or towns be responsible for paying to deal with the bubble wrap (气泡垫) that encased your television?
From the governments' point of view, a primary goal of laws requiring extended producer responsibility is to transfer both the costs and the physical responsibility of waste management from the government and tax-payers back to the producers.
| 1． |
By mentioning the Swiss study, the author intends to tell us that.
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| 2． |
The responsibility of e-waste treatment should be extended.
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| 3． |
What does the passage mainly talk about?
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请阅读下列短文, 从短文后各题所给的 A、B、C、D 四个选项中, 选出最佳选项, 并在答题卡上将该项涂黑。
| 1． |
According to the Code, visitors should act.
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| 2． |
What are you encouraged to do when travelling in New Zealand?（）
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C
Have your parents ever inspected your room to see if you cleaned it properly? Imagine having your entire houses, garage, and yard inspected at any time -- with no warning. Inspections were a regular part of lighthouse (灯塔) living, and a keeper's reputation depended on results. A few times each year, an inspector arrived to look over the entire light station. The inspections were supposed to be a surprise, but keeper sometimes had advance notice.
Once lighthouses had telephones, keepers would call each other to warn that the inspector was approaching. After boats began flying special flags noting the inspector aboard, the keeper's family made it a game to see who could notice the boat first. As soon as someone spotted the boat, everyone would do last-minute tidying and change into fancy clothes. The keeper then scurried to put on his dress uniform and cap. Children of keepers remember inspectors wearing white gloves to run their fingers over door frames and windowsills looking for dust.
Despite the serious nature of inspections, they resulted in some funny moments. Betty Byrnes remembered when her mother did not have time to wash all the dishes before an inspection. At the time, people did not have dishwashers in their homes. In an effort to clean up quickly, Mrs. Byrnes tossed all the dishes into a big bread pan, covered them with a cloth and stuck them in the oven. If the inspector opened the oven door, it would look like bread was baking. he never did.
One day, Glenn Furst's mother put oil on the kitchen floor just before the inspector entered their house. Like floor wax, the oil made the floors shiny and helped protect the wood. This time, though, she used a little too much oil. When the inspector extended his hand to greet Glenn's mother, he slipped on the freshly oiled surface. "He came across that floor waving his arms like a young bird attempting its first flight," Glenn late wrote. After he steadied himself, he shook Glenn's mother's hand, and the inspection continued as though nothing had happened.What does Paragraph I tell us about the inspection at the light station?
| A．It was carried out once a year. |
| B．It was often announced in advance. |
| C．It was important for the keeper's fame. |
| D．It was focused on the garage and yard. |
The family began making preparations immediately after ______.
| A．one of the members saw the boat |
| B．a warning call reached the lighthouse |
| C．the keeper put on the dress uniform and cap |
| D．the inspector flew special flags in the distance |
Mrs. Byrnes put the dishes in the oven because this would ______.
| A．result in some fun |
| B．speed up washing them |
| C．make her home look tidy |
| D．be a demand from the inspector |
If the inspector had opened the oven door, he would have seen _______.
| A．an empty pan |
| B．many clean dishes |
| C．pieces of baked bread |
| D．a cloth covering something |
The inspector waved his arms ______.
| A．to try his best to keep steady |
| B．to show his satisfaction with the floor |
| C．to extend a warm greeting to Glenn's mother |
| D．to express his intention to continue the inspection |
In its early history, Chicago had floods frequently, especially in the spring, making the streets so muddy that people, horses, and carts got stuck. An old joke that was popular at the time went something like this: A man is stuck up to his waist in a muddy Chicago street. Asked if he needs help, he replies, "No, thanks. I've got a good horse under me."
The city planner decided to build an underground drainage (排水) system, but there simply wasn't enough difference between the height of the ground level and the water level. The only two options were to lower the Chicago River or raise the city.
An engineer named Ellis Chesbrough convinced me the city that it had no choice but to build the pipes above ground and then cover them with dirt. This raised the level of the city's streets by as much as 12 feet.
This of course created a new problem: dirt practically buried the first floors of every building in Chicago. Building owners were faced with a choice: either change the first floors of their buildings into basements, and the second stories into main floors, or hoist the entire buildings to meet the new street level. Small wood-frame buildings could be lifted fairly easily. But what about large, heavy structures like Tremont Hotel, which was a six-story brick building?
That's where George Pullman came in. He had developed some house-moving skills successfully. To lift a big structure like the Tremont Hotel, Pullman would place thousands of jackscrews (螺旋千斤顶) beneath the building's foundation. One man was assigned to operate each section of roughly 10 jackscrews. At Pullman's signal each man turned his jackscrew the same amount at the same time, thereby raising the building slowly and evenly. Astonishingly, the Tremont Hotel stay open during the entire operation, and many of its guests didn't even notice anything was happening. Some people like to say that every problem has a solution. But in Chicago's early history, every engineering solution seemed to create a new problem. Now that Chicago's waste water was draining efficiently into the Chicago River, the city's next step was to clean the polluted river.
| 1． |
The author mentions the joke to show.
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| 2． |
The city planners were convinced by Ellis Chesbrough to.
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| 3． |
The underlined word "hoist" in Paragraph 4 means "".
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| 4． |
What can we conclude about the moving operation of the Tremont Hotel?
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| 5． |
The passage is mainly about the early Chicago's.
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