分析 本文主要讲述动植物的起源,以及时间发展过程.本文主要讲述动植物的起源,以及时间发展过程.
解答 CCC
28 C 细节题. 根据第一段no animals could have been living if plants hadn't been on land first.可知没有植物,动物根本不能存在,故选C.
29 C 细节题. 根据文章第一段Life on land probably began about 430million years ago,thought it had existed in the water for perhaps as long as 3,000million years.最早出现的植物在四亿三千万年前,一亿年后植物开始生根,即三亿三千万年前. 故选C.
30 C 细节题. 根据文章最后一段They had roots,leaves,wood,but mostly they had not developed seeds.可知最早的树木在很多方面像现在的树木,除了它们没有种子.
点评 学生需要认真阅读原文,把握文章大意,对文章脉络有整体的了解,能仔细查找文中细节,并能根据文章内容进行合理的推测判断.
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