1、Unit 1 Nature in the balance教学知识细解码1harmlengthsurvive2disappearagriculture3不同种类变化，多样性变种，变体4生计在使用的活着的56They did serious harm to tropical rainforest.78harmfultosayingdoes9We stock a wide variety of styles and sizes.1011variousvarietiesfromwith121314Many birds didnt survive the severe winter.1516bysurv
2、ivalsurvived1718Plastic bags are difficult to break down.1920inwas brokenoutup212223The game was put off due to the rain.242526to flyto starttoto27The heavy rain has done/caused great damage to the crops.2829todamageddamagesdamaged30313233onupupup3435The plane flew ten times the height of the kite.3
3、637three times longertwice what it was last year38widthlongerbigthe3940Near the window is a sad mother.4142Here comes the busIn front of our school stands43werecomesarewas44454647484950harmfuldamagesbysurvivordown51to comeupwhatliesvariety52in turnbreathed life intoin danger of53more thanplay a role infeed onbreak down54be known asdue tobuild up55largestmaintainingwiththewhich56knownvarietybirdsis knownis57点 击 右图 进 入 课时分层作业58Thank you for watching!59
