4. Zeebe says its important to look at fast feedbacks. However, he adds, they re limited. From a climate change perspective, This century is the most important time for the next few generations, he told Science News But the world is not ending in 2100. For his new study. Zeebe how focuses on slow feedbacks. While fast feedback events unfold over decades or centuries, slow feedbacks can take thousands of years. Melting of continental ice sheets and the migration of plant life --- as they relocate to more comfortable areas --- are two examples of slow feedbacks.
5. Zeebe gathered information from previously published studies investigating how such processes played out over thousands of years during past dramatic changes in climate. Then he came up with a forecast for the future that accounts for both slow and fast feedback processes. Climate forecasts that use only fast feedbacks predict a 4.5 degree Celsius (8.1 degree Fahrenheit) change by the year 3000. But slow feedbacks added another 1.5 ℃ -- for a 6 total increase, Zeebe reports. He also found that slow feedback events will cause global warming to persist for thousands of years after people run out of fossil fuels to burn.
23. Paragraph 2 ________ 答案:B
24. Paragraph 3 ________ 答案:C
25. Paragraph 4 ________ 答案:F
26. Paragraph 5 ________ 答案:A
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