月日托福写作机经.doc

最权威的台资料来源: 教育优选/ 2010 年2月 21 日托福写作机经【综合写作】 Should all school teachers be required to attend courses every 5 years to update their knowledge? Integrate: Iron fertilization Reading: 1, not efficient, in experiment, only few carbon dioxide could be absorbed. 2, produce toxic chemical materials which will harm the local fish industry. Human beings will be harmed also if they eat those toxic fishes. 3, cause bad impact to ocean biology system. damage ocean's bio-system balance. Lecture: 1, experiment is too short, only for 1 month. Actually, the 2nd and third month, absorption of carbon dioxide will gradually increase. most of CO2 are consumed in the last month which can not be observed in the short experiment. 2, only limited area will generate these toxic materials. stop to use this method in those area then. 3, global warming's risk is greater than regional ocean's bio-system risk. So should concern more about global warming, ignore ocean's biology system damage. 第一段的关键词的确是 ineffective , 说相关实验也少。而在听力里面反驳的时候说的是那个 phytoplankton 我记得貌似是个什么浮游植物,这个东西 can live 2到3 个月。而大多数实验只观察了一个月,所以老师认为如果多观察,等到一个月后就