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综合写作回顾：
阅读：ceramic plates的三种可能用处
1.放在火上当cooking pans
2.蒙上兽皮当drums
3.装上液体当mirrors
听力反驳：阅读部分的三个theories都是unconvincing
1.如果放在火上加热，底盘会有blacking和discoloration。然而实际当中并没有发现。
2.因为是ceramic，所以即使蒙上animal skins，也不能发出drum的声音，而且这种方式太重。用木头和动物skins更轻而且声音更好，有更适合的材料，但是不用很奇怪。
3.如果作为mirror，底盘没有花纹的一面没法看见。既然如此就没有必要设计。基于已有的发现，显然不是作为镜子。
独立写作回顾：
Do you agree or disagree with the statement: All the university students should be required to take history courses no matter what fields they study is.
Disagree（建议从此角度入手）：
1. 历史课程会给学生造成更大的学业压力。History courses would put more academic pressure on students. 学生会担忧作业或期末考试。students would worry whether they could finish their homework on time and how they would pass final examinations.举例论证：医学生a medical student（not only obliged to finish his professional papers for credit, but he also needs to find the opportunity to get clinical experience.）
2.造成经济负担A required history course would lead to unnecessary cost for parents and students.因果论证：学校聘请专业教授使支出增加，从而提高学费增加学生负担。colleges have to hire talented and senior history professors and experts, this would increase the cost of schooling. These costs would be reflected in the tuition fee.
3.结论：强制学生学习历史会对学生造成学业和经济负担。making every college student take a history course would overburdened the students both academically and financially.
Agree（思路）：
1.避免历史的错误。Students could learn to prevent repeating the mistakes of the past.举例论证：避免战争。learn about the cause of the world wars and other bloody battles that claimed the lives of millions.
2.认清现实。Students could also gain a better understanding of current issues by studying historical events. 美国的民主制：studying the American Revolution a student could be enlightened on the current world democracy.
3.结论：History classes should be made compulsory for college students, for the reason that they could be more familiar with the advancement and evolution of human society.
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