2012年考研英语二阅读理解答案解析如下：
【第一篇阅读】
1. 问题：What is the main idea of the passage?
答案：The passage discusses the importance of cultural diversity in a globalized world.
2. 问题：What is the author's attitude towards cultural diversity?
答案：The author believes that cultural diversity is essential for a healthy global society.
【第二篇阅读】
1. 问题：What is the main purpose of the passage?
答案：The passage explains the reasons for the increase in obesity rates in the United States.
2. 问题：What is the author's solution to the obesity problem?
答案：The author suggests that a combination of better education and policy changes is needed to combat obesity.
【第三篇阅读】
1. 问题：What is the main idea of the passage?
答案：The passage explores the impact of technology on education.
2. 问题：What is the author's opinion about online education?
答案：The author thinks that online education has both positive and negative aspects.
【第四篇阅读】
1. 问题：What is the main purpose of the passage?
答案：The passage analyzes the causes and effects of climate change.
2. 问题：What is the author's solution to climate change?
答案：The author advocates for a global effort to reduce greenhouse gas emissions.
【第五篇阅读】
1. 问题：What is the main idea of the passage?
答案：The passage discusses the role of social media in modern politics.
2. 问题：What is the author's opinion about the influence of social media on politics?
答案：The author believes that social media has both positive and negative effects on politics.
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