52. What do we learn from the findings of a separate study?
- A. Shrinking krill population and rising temperatures could force Antarctic whales to migrate.
- B. Human activities have accelerated climate change in the Antarctic region in recent years.
- C. Industrial fishing and climate change could be fatal to certain Antarctic species.
- D. Krill fishing in the Antarctic has worsened the pollution of the pristine waters.
答案：C
答案句：Earlier this month a separate study found that a combination of climate change and industrial fishing is threatening the krill (磷虾) population in Antarctic waters, with a potentially disastrous impact on whales, seals and penguins.
参考译文：本月早些时候，另一项研究发现，气候变化和工业捕鱼的共同作用正威胁着南极水域的磷虾种群，对鲸鱼、海豹和企鹅可能产生灾难性影响。
定位线索：题干“a separate study”→答案句“a separate study found”；文中“climate change and industrial fishing”对应选项C“Industrial fishing and climate change”；文中“potentially disastrous impact”对应选项C“fatal”。
解析：题干问另一项研究的发现，答案句明确指出气候变化和工业捕鱼威胁磷虾，并对鲸鱼、海豹、企鹅有潜在灾难性影响，与选项C“可能对某些南极物种致命”完全对应。选项A“迫使鲸鱼迁移”无原文依据；B“人类活动加速气候变化”范围扩大；D“恶化污染”偷换概念，原文未提污染。
54. What happens when sea levels rise in the Antarctic?
- A. Many baby king penguins can't have food in time.
- B. Many king penguins could no longer live on krill.
- C. Whales will invade king penguins' breeding grounds.
- D. Whales will have to travel long distances to find food.
答案：A
答案句：As the ocean warms, a body of water called the Antarctic Polar Front-an upward movement of nutrient-rich sea that supports a huge abundance of marine life-is being pushed further south. This means that king penguins, which feed on fish and krill in this body of water, have to travel further to their feeding grounds, leaving their hungry chicks for longer.
参考译文：随着海洋变暖，被称为南极极地锋的水体——一种富含营养的海水上升流，支撑着大量海洋生物——被进一步推向南方。这意味着以该水体中的鱼类和磷虾为食的王企鹅不得不走更远的路去觅食地，让饥饿的幼崽等待更长时间。
定位线索：题干“sea levels rise”→答案句“As the ocean warms”（海洋变暖导致海平面上升）；文中“leaving their hungry chicks for longer”对应选项A“baby king penguins can't have food in time”；文中“travel further to their feeding grounds”是原因。
解析：题干问海平面上升时会发生什么，答案句说明海洋变暖使王企鹅觅食距离变远，幼崽挨饿时间更长，与选项A“许多小企鹅不能及时获得食物”对应。选项B“不再以磷虾为食”错误，原文说仍以磷虾为食；C“鲸鱼入侵繁殖地”和D“鲸鱼长途跋涉”均无原文依据，属于无中生有。
55. What do we learn about the Southern Ocean?
- A. The king penguins there are reluctant to leave for new breeding grounds.
- B. Its conservation is key to the sustainable propagation of Antarctic species.
- C. It is most likely to become the ultimate retreat for species like the king penguin.
- D. Only a few of its islands can serve as huge breeding grounds for king penguins.
答案：D
答案句：The report found that although some king penguins may be able to relocate to new breeding grounds closer to their retreating food source, suitable new habitats would be scarce. Only a handful of islands in the Southern Ocean are suitable for sustaining large breeding colonies.
参考译文：报告发现，尽管一些王企鹅可能能够迁移到更靠近其退缩食物来源的新繁殖地，但合适的新栖息地将非常稀缺。南大洋中只有少数岛屿适合维持大型繁殖群落。
定位线索：题干“Southern Ocean”→答案句“Only a handful of islands in the Southern Ocean”；文中“Only a handful of islands”对应选项D“Only a few of its islands”；文中“suitable for sustaining large breeding colonies”对应选项D“serve as huge breeding grounds”。
解析：题干问关于南大洋的陈述，答案句明确指出南大洋只有少数岛屿适合维持大型繁殖群落，与选项D“只有少数岛屿能作为王企鹅的巨大繁殖地”完全对应。选项A“王企鹅不愿迁移”无原文依据；B“保护南大洋对物种繁殖关键”过度推断；C“成为最终避难所”与原文“合适栖息地稀缺”矛盾。