题目

阅读填空 以下是两篇课文选段，请任意选择一篇，并根据课文，在文中划线处填上适当单词，每空一词， 1） Born in 1930, Dr Yuan __1___ from Southwest Agricultural College in 1953. Since then,    2   ways to grow more rice has been his life goal. As a young man, he saw the great need for increasing the rice output. At that time,   3   was a disturbing problem in many parts of the countryside. Dr Yuan _4__ for a way to increase rice harvests without __5__ the area of the fields. In 1950, Chinese farmers could produce only fifty million tons 将如图所示的字母“W’沿箭头所示方向平移2crn．