Reference for Teaching
reference for teachingⅰ.異域風情
koala
why did the koala cross the road?to get to less harmful tree leaves on the other side,according to new australian research.
for years koalas have puzzled scientists by risking their lives to cross busy highways to eat from a particular eucalyptus tree(桉樹) while refusing hundreds of other trees of the same species.
it is a new chemical in those particular eucalyptus trees which stop the koalas from eating them.koalas have a digestive system that lets them not be harmed by the poison in the eucalyptus tree,which could be harmful to humans.
the guinness book of records lists koalas,native to australia and in danger of extinction,as the world’s most strict eaters.they are known to choose 0.6 kilogram leaves to eat a day from nine kilograms.a koala’s diet is almost wholly limited to eucalyptus leaves,very low in energy-producing nutrients,but it is the picky(挑剔的) eating habit which is putting the animal at risk.
since european settlement,about 80 per cent of australia’s eucalyptus forests have been cleared and most remaining trees are on private land.
the koala’s slow movement also makes it a frequent victim of dogs,cars and bushfires.the australian koala foundation says that 4000 koalas are killed each year by dogs and traffic.koalas now number less than 100 000 down from millions in the 1920s when they were shot for their fur.
ⅱ.知識歸納
1.不能用于進行時態(tài)和被動語態(tài)的動詞
英語中有些動詞比較特殊，它們不能用于進行時態(tài)和被動語態(tài)，這樣的（短語）動詞常見的有：
(1)belong to 屬于……
our success belongs to all the people present.
我們的成功屬于在座的每一個人。
(2)meet 遇見；碰到
i met him in the street at eight yesterday morning.
昨天早晨8點鐘我在街上碰到了他。
(3)stay,keep,remain等動詞
the weather has stayed hot recently.
最近天氣一直很熱。
after his election to a high officer,he remained modest.
在被選為高級領(lǐng)導干部之后他仍然謙虛。
(4)wash easily(易洗)，break easily(易折),write smoothly(寫起來流暢),light easily(易燃)等動副搭配。
this kind of cloth washes easily.
這種布容易洗。
it is very wet,the match does not light easily.
天氣很潮濕，火柴不易劃著。
(5)stand,lie等靜態(tài)動詞
這些動詞表某物位于某處。
there stands a high building over there.
那邊矗立著一座高高的樓房。
(6)taste,feel,look,smell,sound等感官動詞
this kind of food tastes good.
這種食物嘗起來味道很好。
ice always feels cold to us.
對我們來說冰摸起來總是冷的。
(7)sell well(暢銷)，last well(持久)，wash well（耐洗），write well(寫起來流暢)等動副搭配。