高一英语人教版必修4优化指导精品课件unit2.ppt

高一英语人教版必修4 优化指导精品课件 unit 2;【问题导读】 Read the text and try to tell if these sentences are True( T ) or False(F)． 1．The passage is mainly about how Yuan Longping cultivated hybrid rice successfully.(　　) 2．Before Yuan devoted himself to the study of hybrid rice，he had worked as a teacher in Hunan Province.(　　) 答案：1.T　2.T;Yuan Longping’s road to super hybrid rice 袁隆平，中国工程院院士，我国当代杰出的农业科学家，享誉世界的“杂交水稻之父”。他工作50多年来所取得的科研成果使我国杂交水稻研究及应用领域领先世界水平，不仅解决了中国粮食自给难题，也为世界粮食安全做出了杰出贡献。;Yuan Longping was born in a poor farmer’s family in 1930 and graduated from the Southwest Agricultural College in 1953.Then he began his teaching career at an agriculture school in Anjiang，Hunan Province. He came up with an idea of hybridizing rice in the 1960s，when a series of natural disasters and improper policies had plunged1 China into a famine2 that caused many deaths.Since then，he has devoted himself to the research and development of a better rice breed3. ;In 1964，he happened to find a natural hybrid rice plant that had obvious advantages over others.Greatly encouraged，he began to study the elements of this particular type.In 1973，in cooperation with others，he was able to cultivate4 a type of hybrid rice species which had great advantages.It yielded5 20 percent more per unit than that of common ones.The next year their research made a breakthrough in seeding.They successfully developed a set of technologies for producing hybrid rice，putting China in the lead worldwide in rice production.For this achievement，he was named the“Father of Hybrid Rice.”;In 1979，their technique for hybrid rice was introduced into the United States，the first case of intellectual6 property rights transfer in the history of new China. At present，as many as 50% of China’s total rice fields grow Yuan Longping’s hybrid rice species，which yield 60% of the rice production in China.Due to Yuan’s hard work，China’s total rice output rose from 50 million tons in 1950 to nearly 200 million tons in recent years.The annual yield is enough