2018年12月大学英语六级听力真题第1套-Passage1

题目：
9.
A) The unprecedented high temperature in Greenland.
B) The collapse of ice on the northern tip of Greenland.
C) The unusual cold spell in the Arctic area in October.
D) The rapid change of Arctic temperature within a day.

10.
A) It has created a totally new climate pattern.
B) It will pose a serious threat to many species.
C) It typically appears about once every ten years.
D) It has puzzled the climate scientists for decades.

11.
A) Extinction of Arctic wildlife.
B) Iceless summers in the Arctic.
C) Emigration of indigenous people.
D) Better understanding of ecosystems.

原文：
Passage 1
During the Arctic winter from October to March, the average temperature in the frozen north typically hovers around minus 20 degrees Celsius. But this year, the Arctic is experiencing much higher temperatures. On February 20, the temperature in Greenland climbed above freezing or zero degrees Celsius and it stayed there for over 24 hours. Then on February 24, the temperature on Greenland's northern tip reached six degrees Celsius. Climate scientists described the phenomenon as "stunning." 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 rank as the hottest years on record—and the Arctic is warming twice as fast as anyplace 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. 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.
Question 9: What did climate scientists describe as "stunning"?
Question 10: What does the passage say about the temperature surge in the Arctic?
Question 11: What may occur in 20 years according to scientists' recent observations?

答案：
9. A
10. C
11. B