题目内容
Ecology: Rescuing the Environment
The comforts and conveniences of modern life have brought with them problems that did not exist in the days of simpler living. Machinery which operates on electricity made by burning coal or petroleum is used to process raw materials taken from the earth. Gases from the burning fuels are sent into the air. Wastes from making raw material into finished products are sent both into the air and into the water.As a result of these and of other pollutants, some lakes and rivers have become so contaminated that the fish in them die. Besides the dangers to health from breathing polluted air and the waste gases have effects on the upper atmosphere, which may endanger life on earth.
These threats, as well as the depletion(耗尽) of natural resources (such as fuels, forests and soil) by carelessly wasteful use, have worried scientists and other thoughtful people.
Such persons are also disturbed about the effects of chemical fertilizers and of poisons which farmers use in order to destroy insects and weeds. Above all they are alarmed at the interference(冲突) with the natural balance of the environment and its possible consequences(结果).
As a result, there have been attempts to alert the public to these dangers and to control pollution, as well as to reduce the wasting of natural resources. One way of bringing these problems to the attention of the public is the yearly celebration of Earth Day, which began in 1970. There are also articles and books by environmentalists and organizations interested in ecology, the study of the interdependence of organisms and the environment.
The United States government's Environment Protection Agency is studying various ways of avoiding danger to the population. For example, its scientists are making investigations to find out whether water pipes made of certain materials can have chemical effects on the water they transport, which might induce (引起) cancer or other diseases. By these and other antipollution studies and regulations, it is hoped that the environment can be prevented from deteriorating(恶化)further.
1. Raw materials taken from the earth is used to operate on electricity made by burning coal or petroleum. ( )
2. Scientists and other thoughtful people have worried about the depletion of natural resources by carelessly wasteful use. ( )
3. Farmers who are disturbed about the effects of chemical fertilizers and of poisons for destroying insects and weeds are alarmed at the interference with the natural balance of the environment. ( )
4. There are also articles and books by environmentalists and organizations which are interested in the study of the interdependence of organisms and the environment. ( )
5. Water pipes made of certain materials have chemical effects on the water they transport, which induces cancer or other diseases. ( )
提示:
| 1.
原材料用电力来操作,显然是不可能的,第一段中提到,电力操作的是机器
2. 参看第三段 3. 第四段中可以看出,被disturbed的不是农民,而是thoughtful people 4. 参看倒数第二段倒数第二行 5. 和倒数第一段中那句话比较一下就能看出少了一个might,表示可能性比较小
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Plants are flowering faster than scientists predicted(预测)in reaction to climate change, which could have long damaging effects on food chains and ecosystems.
Global warming is having a great effect on hundreds of plant and animal species around the world, changing some living patterns, scientists say.
Increased carbon dioxide(CO2)in the air from burning coal and oil can have an effect on how plants produce oxygen, while higher temperatures and changeable rainfall patterns can change their patterns of growth.
“Predicting species’ reaction to climate change is a major challenge in ecology,” said the researches of several U.S. universities. They said plants had been the key object of study because their reaction to climate change could have an effect on food chains and ecosystem services.
The study, published on the Nature website, uses the findings from plant life cycle studies and experiments across four continents and 1,634 species. It found that some experiments had underestimated(低估)the speed of flowering by 8.5 times and leafing by 4 times.
“Across all species, the experiments under-predicted the speed of the advance — for both leafing and flowering — that results from temperature increases,” the study said.
The design of future experiments may need to be improved to better predict how plants will react to climate change, it said.
Plants are necessary for life on the Earth. They are the base of the food chain, using photosynthesis(光合作用)to produce sugar from carbon dioxide and water. They let out oxygen which is needed by nearly every organism on the planet.
Scientists believe the world’s average temperature has risen by about 0.8℃ since 1900, and nearly 0.2℃ every ten years since 1979.
So far, efforts to cut emissions(排放)of planet-warming greenhouse gases are not seen as enough to prevent the Earth heating up beyond 2℃ this century — a point scientists say will bring the danger of a changeable climate in which weather extremes are common, leading to drought, floods, crop failures and rising sea levels.
【小题1】What is the key information the author wants to give in Paragraph 1?
| A.Plants’ reaction to weather could have damaging effects on ecosystem. |
| B.The increasing speed of flowering is beyond scientists’ expectation. |
| C.Climate change leads to the change of food production patterns. |
| D.Food chains have been seriously damaged because of weather. |
| A.plants’ flowering is 8.5 times faster than leafing |
| B.there are 1,634 plant species on the four continents |
| C.scientists should improve the design of the experiments |
| D.the experiments failed to predict how plants react to climate change |
| A.they can prove the climate change clearly |
| B.they are very important in the food chains |
| C.they play a leading role in reducing global warming |
| D.they are growing and flowering much faster than before |
| A.It has risen nearly 0.2℃ since 1979. |
| B.Its change will lead to weather extremes. |
| C.It is 0.8℃ higher in 1979 than that of 1990. |
| D.It needs to be controlled within 2℃ in this century. |