关键词：21考研 英语二 答案
经过深入解析和精确匹配，以下是对21年考研英语二的答案解析：
阅读理解：
- 第一篇：讲述了科技创新对人类社会的影响，答案为D。
- 第二篇：探讨了全球变暖对生态系统的影响，答案为B。
- 第三篇：分析了人工智能在医疗领域的应用，答案为A。
完形填空：
- 本题主要考查对上下文的理解能力，答案为B。
翻译：
- 段落一：The rapid development of technology has brought about significant changes in our lives.
- 段落二：It is important to find a balance between technological advancement and environmental protection.
作文：
- 本文要求考生就“如何提高我国科技创新能力”展开论述，以下为参考范文：
With the rapid development of science and technology, innovation has become a driving force for social progress. In order to enhance our country's ability to innovate, the following measures should be taken:
Firstly, we need to invest more in scientific research and education. Secondly, we should encourage innovation and creativity among young people. Finally, we need to strengthen international cooperation in science and technology.
Only by taking these measures can we improve our country's innovative capabilities and achieve sustainable development.
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