职称英语理工类C级真题阅读理解共11页Word下载.docx

1、re usually thinking of the health of the coffee drinker. Is it food for your heart? Does it increase blood pressure? Does it help you concentrate? However, coffee affects the health of the human population in other ways, too.Traditionally, coffee bushes were planted under the canopy（树冠）of taller ind

2、igenous（土生土长的）trees. However, more and more farmers in Latin America are deforesting the land to grow full-sun coffees. At first, this increases production because more coffee bushes can be planted if there arent any trees. With increased production come increased profits.Unfortunately, deforesting

3、for coffee production immediately decreases local-wildlife habitat. Native birds nest and hide from predators（捕食者）in the tall trees and migrating birds rest there.Furthermore, in the long term, the full-sun method also damages the ecosystem because more chemical fertilizers and pesticides are needed

4、 to grow the coffee. The fertilizers and pesticides kill insects that eat coffee plant, but then the birds eat the poisoned insects and also die. The chemicals kill or sicken other animals as well, and can even enter the water that people will eventually drink.Fortunately, farmers in Central and Sou

5、th America are beginning to grow more coffee bushes in the shade. We can support these farmers by buying coffee with such labels as shade grown and bird friendly. Sure, these varieties might cost a little more. But were paying for the health of the birds, the land, ourselves, and the planet. I think

6、 its worth it.31.What is the main idea of this passage?A. Farmers are changing the way they grow coffee.B. Coffee is becoming more expensive to produce.C. Shade-grow coffee is more expensive than sun-grow coffee.D. People should buy shade-grown coffee.32. The function of the word Traditionally in Pa

7、ragraph 2 is to show_.A. the positive effects of coffee.B. a change of coffee growth.C. something that is the most important.D. how coffee production used to be33.What does increased production of full-sun coffee bring about?A. More insects.B. Better quality coffee.C. Larger farms.D. Higher profits.

8、34.How do farmers find more land for growing full-sun coffee?A. They buy more land from other farmers.B. They cut down trees.C. They move to another country.D. They turn grassland into farmland.35. The full-sun method may affect the following EXCEPT_ full sunA. insects.B. air.C. birds.D. humansSoot（

9、煤烟灰）and Snow: a Hot CombinationNew research from NASA scientists suggests emissions of black soot after the way sunlight reflects off snow. According to a computer simulation, black soot may be responsible for 25 percent of observed global warming over the past century.Soot in the higher latitudes（维

10、度）of the Earth, where ice is more common, absorbs more of the suns energy and warmth than an icy, white background. Dark-colored black carbon, or soot, absorbs sunlight, while lighter colored ice reflects sunlight.Soot in areas with snow and ice may play an important role in climate change. Also, if

11、 snow and ice covered areas begin melting, the warming effect increase, as the soot becomes more concentrated on the snow surface. This provides a positive feedback, as glaciers and ice sheets melt, they tend to get even dirtier. said Dr. James Hansen, a researcher at NASAs Goddard Institute for Spa

12、ce Studies, New York.Hansen found soots effect on snow albedo（反照率）, which may be contributing to trends toward early springs in the Northern Hemisphere, such as thinning Arctic sea ice and melting glaciers permafrost. Soot also is believed to play a role in changes in the atmosphere above the oceans

13、 and land.Black carbon reduces the amount of energy reflected by snow back into space, thus heading the snow surface more than if there were no black carbon, Hansen said. Soots increased absorption of solar energy is especially effective in warming the worlds climate. This forcing is unusually effec

14、tive, causing twice as much global warming as a carbon-dioxide forcing of the same magnitude. Hansen noted.Hansen cautioned, although the role of soot in altering global climate is substantial, it does not alter the fact that greenhouse gases are the primary cause of climate warming during the past

15、century. Such gases are expected to bi the largest climate forcing for the rest of the century.The researchers found that observed warming in the Northern Hermisphere was large in the winter and spring at middle and high latitudes. These observations were coherent with the researchers climate model situations, which showed some of the largest warming effects occurred when there were heavy snow cover and sufficient sunlight.36.Which of the following statements of s