人教高中英语必修4Unit2Using language 共23张

1、Safe and Green Food,Have you ever been to the countryside,Do you know the following grains,wheat,rice,sorghum,corn,cotton,peanut,soybean,Have you ever grown any of these plants,Do you know how to work on a farm,Lets go to the farm,First, buy or select the,seeds from the store,Second, we need,to plou

2、gh or turn,over the soil,Third , we sow,the seeds in the,soil,Finally, we can harvest our,grain/sorghum/peanuts,water the crop,rid the soil of,the weed,fertilize,the soil,kill off the pest,to improve the output,of the crop,Farmers put fertilizers,on the soil to make crops grow,Chemical,Organic,OR,fa

3、rming,SCANNING,Para 1-2,What problems can be caused by chemical fertilizers,1. Damage _ by killing the _ bacteria,and pests _ the harmful ones,3. Lead to _ or other illness,4. Food grown with chemical fertilizers look,_, but inside there is usually more water,than _ and minerals,the land,helpful,as

4、well as,cancer,beautiful,vitamins,2. Affect crops, animals and humans since,_ get inside the trops and cannot just be,_,chemicals,washed off,SCANNING,Para 3-4,Match the advantages of organic farming with the methods,1.They use waste,from animals,2. Change the kind of,crop in each field every,year,3.

5、 They plant different,crops in the same field,A. Put important,minerals back into,the soil,B. They make full,use of the soil,C. The soil is richer in,minerals,METHODS,ADVANTAGES,Which is healthier, chemical or organic farming,Not only in farming, people also use,chemical additives,in food production

6、,T or F,1,As a result of scientific intervention,介入,some harmful substances,物质,have been added,to our food,2. Nitrates are usually used for keeping the smell,of food,3. “FDA” means Food and Drug Administration,4. All the drugs given to the living animals are for,the health of the living animals,5. T

7、he FDA has tried to control the process of food,T,F,T,F,F,additive,ditiv,添加剂,some food additives not allowed to use in China,三聚氰胺,Melamine,mel?min,苏丹红,Sudan Red,su:d?n,瘦肉精,lean meat powder,some food additives not allowed to use too much in China,防腐剂,preservative,priz?rv?tiv,漂白剂,bleach,bli:t,着色剂,stai

8、n,stein,So how do we eat safely and healthily,Have,enough food,Eat unpolluated food,Eat fresh food,Eat nutritious food,Do use safe water and raw materials,Cook foods for the appropriate length of time,and at the appropriate temperature to kill,pathogens,致病菌,Group work,Now youre a shop keeper. Design

9、 a poster for your,green food,attractive and colorful,detailed but brief(list,Flavored milk from,California,No additives,Low-fat and without artificial colorings,Low sugar content,Five flavors,strawberry,banana, apple, pear,and chocolate,Long life for storage,Safe, healthy and wonderful for you,and

10、your family,title,body,conclusion,Design your own poster now,Now youre a shop keeper. Design a poster for your,green food,1,Decide the name of your shop and the food you sale,2,Give three or more reasons to encourage,people to buy your food,3. Your poster should include three parts,title, body and conclusion,4. Write short sentences and make your poster as,beautiful as you can,Useful words and expressions may help you,energy-giving food,body-building food,protecti