人教版下学期高一英语Unit19 1 课件VIP免费

Changes in people’s eating habitsChanges in economic developmentChanges in agricultural produceUseful expressionsIn my opinion you should…If I were you…As far as I can see the best thing would be to…Wouldn’t it be better if…?I think he is right…We have to make a choice…We can’t do both, so…The other idea sounds better to me…Useful expressionsAs far as I am concerned, I think…Don’t you agree that…I can’t help thinking that…It seems to me that…Personally, I think…The point is that…From where I stand, From my point of view,I hold the opinion that…It’s my considered opinion that…1.Look at the pictures and compare traditional and modern farming.2.What are the advantages and disadvantages of each way?Pre-reading• Raising chickensSmall scaleLarge scaleThe farmers can keep only a few chickens.It does not cost a lot to keep the chickens.It is not a lot of work to keep the chickens.The chickens don’t have many problems.The chickens are not so fat.The eggs and the meat taste very good.The chickens are free.The farmers can keep thousands of chickens.It costs a lot of money to keep the chickens.It is a lot of work to keep them: feeding, cleaning, etc.If the chickens get ill, many die or must be killed.The chickens are big and fat.The meat and eggs don’t taste so good.The chickens are not free.• FertilizersNatural fertilizer manure/dungChemical fertilizerIt’s free or can be bought at low price.It is a lot of work to mix it with the soil.It has a bad smell.It takes a lot of place to store.It is difficult to transport.It’s expensive.It is not a lot of work to mix it with soil.It has no smell.It takes little pace to store.It is easy to transport.• HorsepowerAnimals (buffalo/ox)mach...