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A、Extinction of Arctic wildlife. B、Iceless summers in the Arctic. C、Emigration of indigenous people. D、Better understanding of e
A、Extinction of Arctic wildlife. B、Iceless summers in the Arctic. C、Emigration of indigenous people. D、Better understanding of e
admin
2021-01-08
39
问题
During the arctic winter from October to March, the average temperature in the frozen north typically hovers around minus 20 degree Celsius. But this year the Arctic is experiencing much higher temperatures.
[9] On February the 20th the temperature in Greenland climbed above freezing or zero degree Celsius and it stayed there for over 24 hours. Then on February the 24th the temperature on Greenland’ s northern tip reached six degree Celsius. Climate scientists describe the phenomenon as stunning. [10] Weather conditions that drive this bizarre temperature surge have visited the Arctic before. They typically appear about once in a decade. However, the last such increase in temperature took place two years ago. This is troubling as climbing arctic temperatures combined with rapid sea ice loss are creating a new type of climate feedback loop which could accelerate Arctic warming. Indeed, sea ice cover in the Arctic is melting faster than expected. Without those masses of cooling sea ice, warm air brought to the Arctic can penetrate further inland than it ever did before. The air can stay warmer longer too. This drives additional melting.
Overall, earth is warming at a rapid pace. 2014 through 2017 ranks the hottest years on record and the Arctic is warming twice as fast as any place else on earth. This raises unique challenges for Arctic wildlife and indigenous people who depend on Arctic ecosystems to survive. Previously climate forecasts predicted that Arctic summer ice would disappear entirely by around 2060, [11] but based on what scientists are seeing now, the Arctic may be facing summers without ice within 20 years.
Questions 9 to 11 are based on the passage you have just heard.
9. What did climate scientists describe as stunning?
10. What does the passage say about the temperature surge in the Arctic?
11. What may occur in 20 years according to scientists’ recent observations?
选项
A、Extinction of Arctic wildlife.
B、Iceless summers in the Arctic.
C、Emigration of indigenous people.
D、Better understanding of ecosystems.
答案
B
解析
题干问的是根据科学家们的最近观察,20年内会发生什么。短文最后提到,此前的气候预报预测,北极夏季冰层将在2060年左右完全消失,但根据科学家们目前的观测看来,北极可能在20年内面临没有冰的夏季,故答案为B(北极无冰的夏季)。原文只提到了北极野生动物和当地居民受到影响,并没有提到北极野生动物灭绝,当地人移居国外,故A项(北极野生动物的灭绝)和C项(本地居民移居国外)排除。D项(对生态系统更好的理解)原文未提及,故排除。
转载请注明原文地址:https://kaotiyun.com/show/aOP7777K
0
大学英语六级
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