在考研英语一和英语二中，答案的选择需要基于对文章内容的准确理解和词汇的熟练运用。以下是一些示例答案：
考研英语一答案示例：
1. 问题：What is the main purpose of the passage?
答案：To argue that technological progress has its downsides.
2. 问题：Which of the following is NOT mentioned as a reason for the change?
答案：The increased demand for coffee.
考研英语二答案示例：
1. 问题：What can be inferred about the author's attitude towards the new policy?
答案：The author appears cautiously optimistic.
2. 问题：Which sentence best supports the statement that "the impact of social media is profound"?
答案：The sentence that discusses the increase in cyberbullying cases.
考研数学答案示例：
1. 问题：If \( f(x) = x^2 - 4x + 3 \), find the derivative of \( f(x) \).
答案：\( f'(x) = 2x - 4 \).
2. 问题：Solve the equation \( 2x^2 - 5x + 3 = 0 \).
答案：\( x = 1 \) 或 \( x = \frac{3}{2} \).
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