题目内容
look like parks. In Canada, the Coast Plaza Hotel in Vancouver has a forest on its roof. New York City
has an unusual example farm for hydroponics. The farm is on a boat called the Science Barge. Rainwater
and river water are used to grow lettuce, tomatoes, cucumbers and peppers. The farm shows the
possibilities for designing rooftop systems.
Green roofs are designed to save energy and capture rainwater. Rooftops covered with plants help
keep buildings cool. They can extend the life of a roof. And they can reduce water running off into streets
and storming water systems.
Experts say green roofs usually do not get much above 27℃. So temperatures might not be a problem for growing. But rooftop gardeners have to be careful not to put too much weight on the roof. This is true whether plants are grown in soil or water.
Earlier in 2008, researchers in Texas reported that green roofs can reduce a building's air conditioning
costs by about one fifth compared to blacktop roofs. But they also reported that not all green roofs
perform equally well. They found that designs differ in their ability to keep buildings cool and to capture
rainwater. The researchers put experimental roofs on top of metal insulated (隔热的) boxes, to recreate
green roof conditions. The study compared products from six companies to help businesses understand
how to improve their designs. Each rooftop had sixteen different kinds of plants native to Texas. The
researchers say the presence of native plants likely helped all the green roofs capture water better
compared to sedums. Sedums are plants that need little water and often are used on green roofs. The
native plants could take in more water and release more of it to the atmosphere.
B. tell us Germany is the country that leads or guides the green roof design
C. introduce some famous hotels in the world
D. lead to the topic of the passage
B. prolonging the roof's life
C. keeping the house cool
D. reducing the house's air conditioning costs
B. Not all the green roofs can reduce the building's air conditioning costs equally.
C. Different designs of green roofs have different effects on buildings.
D. Sedums are a kind of plants native to Texas.
B. to show us how to design green roofs
C. to introduce a kind of roof made of metal
D. to provide proofs to improve the design of green roofs
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However, while some seem to be lost in the desire to succeed, others take an opposite attitude. In a culture which values only the winner and pays no attention to the ordinary players, they strongly blame competition. Among the most vocal are youngsters who have suffered under competitive pressures from their parents or society. Teaching these young people, I often observe in them a desire to fail. They seem to se ek failure by not trying to win or achieve success. By not trying, they always have an excuse: “I may have lost, but it doesn’t matter because I really didn’t try.” What is not usually admitted by themselves is the belief that if they had really tried and lost, that would mean a lot. Such a loss would be a measure of their worth. Clearly, this belief is the same as that of the true competitors who try to prove themselves. Both are based on the mistaken belief that one’s self – respect relies on how well one performs in comparison with others. Both are afraid of not being valued. Only as this basic and often troublesome fear begins to dissolve (缓解) can we discover a new meaning in competition.
However, while some seem to be lost in the desire to succeed, others take an opposite attitude. In a culture which values only the winner and pays no attention to the ordinary players, they strongly blame competition. Among the most vocal are youngsters who have suffered under competitive pressures from their parents or society. Teaching these young people, I often observe in them a desire to fail. They seem to se ek failure by not trying to win or achieve success. By not trying, they always have an excuse: “I may have lost, but it doesn’t matter because I really didn’t try.” What is not usually admitted by themselves is the belief that if they had really tried and lost, that would mean a lot. Such a loss would be a measure of their worth. Clearly, this belief is the same as that of the true competitors who try to prove themselves. Both are based on the mistaken belief that one’s self – respect relies on how well one performs in comparison with others. Both are afraid of not being valued. Only as this basic and often troublesome fear begins to dissolve (缓解) can we discover a new meaning in competition.