关键词：考研英语、难句解析、答案
考研英语难句解析：
1. Although it was not widely accepted, the theory that the sun revolves around the earth was supported by many astronomers during the Middle Ages.
解析：这句话的主句是“the theory was supported by many astronomers”，从句是“Although it was not widely accepted”。这里使用了“Although”引导的让步状语从句，说明尽管这个理论没有得到广泛认可，但许多天文学家还是支持这个理论。
答案：这个理论在中学时代并没有被广泛接受，尽管如此，许多天文学家还是支持这个太阳围绕地球转的理论。
2. The rapid development of technology has brought about significant changes in the way we live, work, and communicate.
解析：这句话的主句是“The rapid development of technology has brought about significant changes”，其中“the way we live, work, and communicate”是宾语从句，作为“changes”的定语。
答案：科技的快速发展给我们的生活方式、工作方式和沟通方式带来了重大变化。
3. It is widely believed that exercise can improve mental health and reduce the risk of chronic diseases.
解析：这句话的主句是“It is widely believed that exercise can improve mental health and reduce the risk of chronic diseases”，其中“It”是形式主语，真正的主语是“that exercise can improve mental health and reduce the risk of chronic diseases”。
答案：人们普遍认为，锻炼可以提高心理健康并降低慢性病的风险。
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