1 . 根据课文内容填空
Yuan Longping, known as the “father of hybridrice”, is one of China’s most famous scientists, Yet, he considers himself a farmer because he continually works the land in his research. Indeed, his slim but strong body is just like that of miliions of Chinese farmers, to whom he has 1 his life.
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 somnetimes even had a serious 2 of food to eat. To tackle this 3 , he chose to study agriculture and received aneducationat Seuthwest Agricultural College in Chomgqing.
After 4 in 1953, he worked as a researcher. Yuan Longping realised that larger fields were not the solution. Instead, farmers needed to 5 yields in the fields they had. How this could be done was a challenging question at the time.Yuan was 6 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 7 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 8 then was that it could not be done. Through intense effort, Yuan 9 enormous technical difficulties to develop the first hybrid rice that codld be used for farming in 1974. This hybrid enabled farmers to expand their 10 greatly