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人教版高中英语选择性必修第一册Unit5 Working the land Period 1 课件(该课件内含音频文件)

2024-01-05 16:53

人教版高中英语选择性必修第一册Unit5  Working the land Period 1 课件(该课件内含音频文件)

Who is the man in the photo? What crops is he holding in his hands?
What do you know about the man? 
What else do you want to know about him?
Sometimes a passage does not say something directly. But you can figure it out by looking for the clues and key words in each paragraphs.
Sometimes a passage does not say something directly. But you can figure it out by looking for the clues and key words in each paragraphs.
Why does Yuan Longping consider himself a farmer?
What does Paragraph 1 tell us about Yuan Longping as a “pioneer for all people” directly and indirectly ?
Yuan Longping was born in 1930 in Beijing. His parents wanted him to pursue a career in science or medicine. However, what concerned him most was that farmers often had poor harvests and sometimes even had a serious shortage of food to eat. To tackle this crisis,  he chose to study agriculture and received an education at Southwest Agricultural College in Chongqing.
After graduating in 1953, he worked as a researcher. Yuan Longping realised that larger fields were not the solution. Instead, farmers needed to boost yields in the fields they had. How this, could be done was a challenging question at the time. Yuan was convinced that the answer could be found in the creation of hybrid rice. A hybrid is a cross between two or more varieties of a species. 
One characteristic of hybrids is that they usually attain a higher yield than conventional crops. However, whether it was possible to develop a hybrid of self-pollinating plants such as rice was a matter of great debate. The common assumption then was that it could not be done. Through intense effort, Yuan overcame enormous technical difficulties to develop the first hybrid rice that could be used for farming in 1974. This hybrid enabled farmers to expand their output greatly.

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