[D]The best index fossils tend to be marine creatures. These animals evolved rapidly and spread over large areas of the world.
[E]The earliest animals whose remains have been found were all very simple kinds and lived in the sea. Later forms are more complex, and among these are the sea-lilies, relations of the star-fishes, which had long arms and were attached by a long stalk to the sea bed, or to rocks.
[F]When an animal dies, the body, its bones, or shell, may often be carried away by streams into lakes or the sea and there get covered by mud. If the animal lived in the sea its body would probably sink and be covered with mud. More and more mud would fall upon it until the bones or shell become embedded and preserved.
[G]Many factors can influence how fossils are preserved in rocks. Remains of an organism may be replaced by minerals, dissolved by an acidic solution to leave only their impression, or simply reduced to a more stable form.
解题思路:
本文文章部分共332字,备选答案部分字数为317字,总数达649字。阅读如此长的文章并做对题,要求考生具有较强的阅读理解能力,掌握正确的阅读方法。
首先,通篇略读原文,把握要点词句(文中黑斜体部分为要点词句,以下同),以便对文章主旨、各段基本主题以及逻辑结构获得一个概括性了解。
【2014年考研英语阅读新增题型通关秘籍】相关文章:
最新
2016-10-18
2016-10-11
2016-10-11
2016-10-08
2016-09-30
2016-09-30