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《Using LanguageⅠ》公开课PPT课件优质课下载
3.Can finish the blanks
4.Eat healthy food,and keep healthy eating habits
1.chemical 2.organic 3. reduce 4.fertilizer 5. nutrition 6.导致
7.逐渐增强； 8.肥沃的；富饶的
9. 生产；制造 10.发现；发觉
11.集中（注意力、精力等）于
12. 使…免受
Scan(浏览) the first two paragraphs(段落) and write or draw(划出)your answers.
1.Why are chemical fertilizers so popular infarming today?
2.What problems are caused by using chemichal fertilizsers?
Scan the last two paragraphs and write or draw(划出) your answers.
3.What is organic farming?
4.What is the main reason for using organic farming methods
1.They are a great way to stop crop diseases and increase production.
2.First,chemical fertilizers affect the soil and the water supply badly.Second,food grown with chemical fertilizers has more water than vitamins and minerals.Third,they kl both helpful and harmful pests.
3.Organic farming is simply farming without using any chemicals.
4.To grow good food and to avoid damaging the enviroment or people'health.
1.What are some of the problems ___(cause) by chemical fertilizers?First,they damage the land by killing the helpful bacteria and pest as well as the ___(harm) ones. Chemicals also stay in the ground and underground water ___a long time.. These chemicals in the food supply build ____ in people's bodies over time. Many of these chemicals can lead ____ cancer or other illnesses.
2.They may look ____(beauty), but inside there is usually ____( water) than vitamins and minerals
caused
harmful
for
up
to
beautiful