2014年度全国职称英语等级考试理工B真题及答案.doc

2014年度全国职称英语等级考试理工B真题及答案
D
habitable zone.
A. Right B. Wrong C. Not mentioned
20. The new finding is based on a thorough study of 170,000 stars in the Milky Way.
A. Right B. Wrong C. Not mentioned
21. The estimate of the number of planets that could support life is not very accurate.
A. Right B. Wrong C. Not mentioned
22. This is the first research finding about the planets with a chance for life.
A. Right B. Wrong C. Not mentioned
第3部分：概括大意与完成句子（第23～30题，每题1分，共8分）
下面的短文后有2项测试任务：（1）第23～26题要求从所给的6个选项中为第2~5段每段选择1个最佳标题；（2）第27~30题要求从所给的6个选项中为每个句子确定一个最佳选项。
Climate Change: The Long Reach
1 Earth is warming. Sea levels are rising. There's more carbon in the air, and Arctic ice is melting faster than at any time in recorded history. Scientists who study the environment to better gauge (评估) Earth's future climate now argue that these changes may not reverse for a very long time.
2 People burn fossil fuels like coal and oil for energy. That burning releases carbon dioxide, a colorless gas. In the air, this gas traps heat at Earth’s surface. And the more carbon dioxide released, the more the planet warms. If current consumption of fossil fuels doesn’t slow, the long-term climate impacts could last thousands of years — and be more severe than scientists had been expecting. Climatologist Richard Zeebe of the University of Hawaii at Manoa offers this conclusion in a new paper.
3 Most climate-change studies look at what's going to happen in the next century or so. During that time, changes in the planet's environment could nudge (推动) global warming even higher. For example: Snow and ice reflect sunlight back into space. But as these melt, sunlight can now reach — and warm — the exposed ground. This extra heat raises the air temperature even more, causing even more snow to melt. This type of rapid exaggeration of impacts is called a “fast feedback.”.
4 Zeebe says it's important to look at fast feedbacks. However, he adds, they're limited