考研英语2003年第四篇阅读答案如下：
1. 问题：What is the main concern of the passage?
答案：The passage primarily focuses on the challenges and impact of global warming on various ecosystems.
2. 问题：According to the passage, what is the author's attitude towards the effects of global warming?
答案：The author expresses a serious and concerned attitude towards the detrimental effects of global warming on the environment.
3. 问题：Which of the following is NOT mentioned as a consequence of global warming?
答案：The melting of polar ice caps is mentioned as a consequence, but the expansion of polar bears' habitats is not mentioned.
4. 问题：What is the role of the "Albedo effect" in the context of global warming?
答案：The Albedo effect refers to the reflective nature of snow and ice, which reduces the absorption of solar radiation. A decrease in albedo can lead to increased warming as less sunlight is reflected back into space.
5. 问题：How does the passage suggest that human activities contribute to global warming?
答案：The passage suggests that human activities, such as the burning of fossil fuels and deforestation, contribute to global warming by increasing the levels of greenhouse gases in the atmosphere.
6. 问题：What does the author imply about the future of the Earth's climate?
答案：The author implies that the future of the Earth's climate is uncertain and that immediate action is needed to mitigate the effects of global warming.
微信小程序：【考研刷题通】——你的考研刷题利器！涵盖政治、英语、数学等全部考研科目，海量真题、模拟题，助你高效备战，轻松上岸！立即加入，开启你的考研刷题之旅！【考研刷题通】