分析 本文主要講述動植物的起源,以及時間發(fā)展過程.本文主要講述動植物的起源,以及時間發(fā)展過程.
解答 CCC
28 C 細節(jié)題. 根據(jù)第一段no animals could have been living if plants hadn't been on land first.可知沒有植物,動物根本不能存在,故選C.
29 C 細節(jié)題. 根據(jù)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.最早出現(xiàn)的植物在四億三千萬年前,一億年后植物開始生根,即三億三千萬年前. 故選C.
30 C 細節(jié)題. 根據(jù)文章最后一段They had roots,leaves,wood,but mostly they had not developed seeds.可知最早的樹木在很多方面像現(xiàn)在的樹木,除了它們沒有種子.
點評 學生需要認真閱讀原文,把握文章大意,對文章脈絡有整體的了解,能仔細查找文中細節(jié),并能根據(jù)文章內(nèi)容進行合理的推測判斷.
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