2. 职称英语
  3. 自1949年以来，中国农业科学家共培育出40多种农作物，包括近5 000个高产、优质、抵抗性强的新品种，使主要农作物品种更新四至五次，每更新一次，一般增

自1949年以来，中国农业科学家共培育出40多种农作物，包括近5 000个高产、优质、抵抗性强的新品种，使主要农作物品种更新四至五次，每更新一次，一般增

游客2024-01-20  8
问题     自1949年以来，中国农业科学家共培育出40多种农作物，包括近5 000个高产、优质、抵抗性强的新品种，使主要农作物品种更新四至五次，每更新一次，一般增产10％至30％。中国粮食作物单产已由1950年的1．16吨／公顷(hectare)增加到4.82吨／公顷。与此同时，农业部门从世界各地引进农作物、苗木10万多种，并培育了水稻、玉米、小麦等作物的新品种。许多新的先进技术也得以在农业生产中广泛应用，对提高农民科技素质起到重要作用。
选项
答案     Since 1949, Chinese agricultural scientists have bred over 40 new crops, including nearly 5 000 high-yield and good-quality new varieties with strong resistance. Thus the major crops have been updated four to five times, with an increase of yield by 10 to 30 percent each time. The per-hectare yield of grain crops has increased from 1.16 tons in 1950 to 4. 82 tons. Meanwhile, agricultural departments have imported more than 100 000 crops and seedlings and cultivated new varieties of rice, corn, wheat and other crops. Many new advanced technologies, which have played an important role in promoting the farmers’ sci-tech education, have found extensive application in agricultural production.
解析
转载请注明原文地址:https://tihaiku.com/zcyy/3379156.html
相关试题推荐
随机试题
最新回复(0)