Halley's comet is mentioned in Paragraph 2______. A.to introduce some famous historical events B.to explain some traditional beliefs about comets C.to demonstrate the harm it has done to man D.to show its significance to human history
A.A.to B.to C.to D.to
【参考答案】
B 解析：文章第二段第二句开始谈到哈雷彗星，接着举了哈雷彗星和一系列暴乱相巧合的例子，最后一句话说“这也不是惟一......