高中三年级英语(人教版)全一册 Unit 4 Reading

日期:2010-04-30
分类:高中英语

  高中三年级英语(人教版)全一册 Unit 4 Reading

  THE BIRTH OF A SCIENCE

  Before the eighteenth century, botany was merely a branch of medicine. Until then, mostly doctors and surgeons studied herbs. Attempts had been made by others to classify plant species into groups, but the breakthrough came with the work of Carl Linnaeus. Showing how plants were related was a complex and strange thing before Linnaeus developed his system. The idea to give each species two names was not new, but names were not truly fixed and accepted. Some scientists classified plants into herbs and trees, or according to the shape of the fruit, or whether they had flowers or not. But Linnaeus" idea of grouping plants in families was unique. In his system the identification of different species was based on the arrangement of the male and female organs in the flowers. As a result, fruits such as peaches and pears are in fact related, although they are different at first sight.

  高中三年级英语(人教版)全一册
 
 
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