人教版新课标必修四Unit2 第三课时导学案设计

Book4 unit 2（The third period）目标导学：让学生对课文整体理解，提升能力。

教学重点是对本单元内容进行检测会应用。

难点是关于地点的描写。

潜心自学：重读课文，完成学习任务。

Task 1. Fill in the blanks according to Chinese.1. .________ （尽管）he is one of China’s most famous scientist, Yuan Longping ___________ ________ （认为自己是）a famer, for he ________ ______ _______ to ______ ______ _____________（在田间耕作，进行研究）..2.Indeed, his -________ face and arms and his slim, strong body are just _____ those of ______ ____Chinese farmers,____ ________ he has ___________ for the -_______ ______ __________.的确，他那被太阳晒得黝黑的脸旁和手臂，以及他那瘦削而又结实的身体，就跟其他千百万的中国农民一样，过去五十年来，他一直在努力帮助他们。

3.Yuan Longping grows ______ _____ ________ super hybrid rice..袁隆平种植的是被称为“超级杂交水稻”的稻种。

4. This special strain of rice _______ _____ possible _____ __________(produce) 20% more of the crop in the same fields.这种特殊的水稻使得同样的田地多收获20%的产量。

5._______ _______,(从那时起)finding ways to grow more rice _____ ______ his life goal.6.At that time,hunger was ____ ____________ ___________（一个另人困扰的问题）.7. Dr Yuan _________ ________a way to increase rice harvests _______________ of the fields.袁隆平要在不增加土地面积的基础上寻求增收稻谷产量的途径。

8. ________ ____ （由于）his research, the UN has more tools in the battle to（去除）____ the world ____ hunger. Using his hybrid rice, farmers are producing harvests ______ ____ ______ ____ before.由于他的研究，联合国在消除世界饥饿的战斗中又多了些新方法。

用他的杂交水稻种子，农民们种出的粮食比以前多了一倍。

9. Dr Yuan _____ ______ ________ _____(相当满意) his life. However, he doesn't ______ _____ ________(be) famous He _______ ________ _______ (宁愿)keep time for his hobbles.10. Spending money ________ himself or ______ a comfortable life also _______ very little to him.在自己身上花钱或享受舒适的生活对他来说意义不大11. He ___________ (因此)gives millions of yuan to _______ others ______（使某人具有）their research in agriculture .12. Many farmers welcomed them as a great way to ____________ and _________________. 很多农民喜欢使用化肥。

把化肥作为防治农作物病虫害和提高产量的重要手段。

13. First, they damage the land ________________ and pests as well as the harmful ones. Chemicals also stay in the ground and underground water for a long time.首先，化肥在杀死病菌和害虫的同时也会杀死有益的细菌和昆虫，从而破坏土地。

化学物质还会在地里和地下水中保存很长时间。

14. This affects crops and, therefore, animals and humans, since chemicals get inside the crops and _____just __________.而这会影响到庄稼，进而影响到动物和人类，因为化学成分会进入到农作物中，并且不能被冲洗掉。

15. With these discoveries, some farmers and many customers _______________________________________________________..由于这些发现，一些农民和消费者开始转向有机耕作。

16.Some organic farmers prefer planting grass between crops to prevent wind or water ________________, and then leaving it in the ground to become a natural fertilizer for the next year's crop.还有一些有机耕作者喜欢在农作物种草，以防止水土流失，并且把草留在地里，从而成为来年农作物的天然肥料。

Task 2 Correction of the sentences.1.In 1974, he became the first agricultural pioneer in the world growing rice that has ahigh output.2.Bearing into a poor farmer's family in 1930, Dr Yuan graduated from SouthwestAgricultural College in 1953.3.In 1950, Chinese farmers could produce only fifty millions tons of rice.4.These increased harvests mean that 22% of the world's people fed from just 7% of thefarmland in China.5.Dr Yuan is now circulating his knowledges in India, Vietnam and many other lessdeveloped countries to increase their rice harvests.6.He enjoys listening to violin music, play mah-jong, swimming and reading.7.Indeed, he believes that a person with too much money has much rather than fewertroubles.8.Long ago Dr yuan had a dream about rice plants as taller as sorghum.9.Dr Yuan awakes from his dream with the hope of producing a kind of rice that could feedmore people.10.Over the past half century, using chemical fertilizers becomes very common in farming.11.Recently, however, scientists have been finding that long-term use of these fertilizers cancause damage to the land and, even more danger, to people's health.12.What are some of the problems causing by chemical fertilizers?13.Many of these chemicals can lead in cancer or other illnesses.课型：复习课课时：1课时14.In addition, fruit, vegetables and other food grown with chemical fertilizers usually growtoo fast to be full with much nutrition.15.They focus on keep their soil rich and free of disease.Task3 Fill in the blanks with the proper words.Dr Yuan Longping was a pioneer of agriculture in China. He_________ (graduate) from Southwest Agriculture in 1953. Since then he devoted his life ______ finding ways to grow more rice. The rice farmers are now producing harvest twice ____ large as before ____ using this kind of rice. _______ he was not satisfied with his work. __________ now he leads a rich life, he still insists on his work to develop his rice. I think his work is really important to the world. Because of his hard work, the production of food __________________ (improve). And the problem of _________ (hungry) can be solved. Thanks ______ Yuan Longping，s great work, millions of people can benefit ______ his extraordinary work.合作助学：Key sentences(Recite)1. Have you ever grown any plants? If so，what did you do to grow them?句型总结：if so译为______________（so 代替______________________）[仿写]你带伞了吗？如果没有，把我的借给你。