人教高中英语必修4unit2usinglanguage(共21张)课件

Unit2
Workingtheland
Usinglanguage
高一人教新课标版必修四
预****检测
1.vt.遗憾,惋惜______→n.遗憾,懊悔____
2.v.集中,聚集_____→n.焦点(复数_______)
3.vt.减少,缩减_______→增加________
4.vt.发表意见,作出评论_______→n.评论,议论_______
5.vt.使迷惑,使为难______→adj.令人迷惑不解的_______→adj.迷惑的,为难的_____→n.混淆,困惑
6.n.生产,制造______→vt.生产,制造/农产品____→n.产品,产物_______
7.n.发现,发觉_____→vt.发现______→n.发现者______
8.n.总结;摘要;概要________→vt.总结,概括________
Reading
CHEMICALORORGANICFARMING?
Itisfertilizer.
Whatisthesubstanceweputonthe
soiltomakecropsgrow?
Howmanykindsoffertilizersdofarmersu?
Therearetwokinds.Theyarechemical
fertilizersandorganicones.
chemicalfertilizer
cowdung
用化学肥料和有机肥料的区别:
OrganicFarming
Learningaims:
Understandthetext,especiallysomelonganddifficultntences.
Learnsomewordsandphras:confuregretreducefocuscommentbuildupleadtokeep…freefrom/of
每…,每隔……
现在完成进行时
V+ing作结果状语
Overpasthalfcentury,uchemicalfertilizershasbecomeverycommominfarm.
Recently,however,scientistshavebeenfoundthatlong-termuofthefertilizerscancaudamageonthelandand,evenmoredangerous,topeople’shealth.
First,theydamagethelandbykillthehelpfulbacteriasandpestsaswellastheharmfulone.
Thisaffectscropsand,therefore,animalsandhumans,sincechemicalsgetinsidethecropsandcannotjustwashedoff.
Thechemicalsinthefoodsupplybuildinpeople’sbodiesovertime.
Onaddition,fruit,vegetablesandotherfoodgrowingwithchemicalfertilizersusuallygrowtoofasttobefullofmuchnutritions.
killing
bacteria
ones
∧
be
∧
up
grown
nutrition
∧
the
using
farming
finding
to
In
7.Organicfarmers,therefore,oftenpreferunaturalwastefromanimalsasfertilizer.
8.Theyoftenchangethekindofcropineachfieldeveryfewyear,forexample,growcornorwheatandthenthenextyearpeasorsoybeans.
9.Cropssuchaspeasorsoybeansputimportantmineralsbackintothesoil,makeitreadyforcropssuchaswheatorcornwhatneedrichandfertilesoil.
10.Organicfarmersalsoplantcropstoudifferentlevelsofsoil,forexample,plantpeanutsthatutheground’ssurfacefollowingbyvegetablesthatputdowndeeplyroots.
using
years
growing
making
followed
that
planting
deep