9.Climate change on Agriculture
Some adverse effects of climate changes change agricultural productions. Some lands are just merely unsuitable for growing crops. There will be millions of people facing hunger in Africa in the near future. Climate change will result in less production and less food. It is difficult for developing countries to deal with climate change due to their financial statusand other issues. There are many people living in hunger especially in Africa. The climate change has devastating effects on world economy. The tropical areas on earth are dry and hot, and are originally not suitable for food production. The change of the climate leads to extreme weather conditions such as floods and hurricanes, which exacerbates the food production issues. As a result, it leads to a continuous decline in food supply annually around 10-17%. And this trend is perceived to be continuing in the future by 2017. The regions suffering the most will be some African countries.
参考答案：Evidences suggest that it took about 35 years for many birds for many birds to move far enough north for winter temperatures to march where they historically lived, and species that do not track changes in climate may wind up at the limits of their physiological tolerance whereas accelerated warming, which is likely as global carbon emissions continue to increase, may put additional strain on birds.
9.The formal written examination can be a valid method to assess students learning. To what extent do you agree or disagree?
论点1：Formal written test is a universally-accepted test form composed by educational authorities, which can systematically and thoroughly examine students’ curriculum knowledge.
展开1：Compared with other test forms, such as group essay or laboratory test, which are relatively more subjective, formal written tests deliver a direct score representing students’ academic results because the process of creating the tests is more rigorous.