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Ecologists: the Scottish Highlands were once the site of extensive forests, but these forests have mostly disappeared and been replaced by peat bogs. The common view is that the Highland’s deforestation was caused by human activity, especially agriculture. However, agriculture began in the Highlands less than 2,000 years ago. Peat bogs, which consist of compressed decayed vegetable matter, build up by only about one foot per 1000 years, and, throughout the Highlands, remains of trees in peat bogs are almost all at depth great than four feet. Since climate changes that occurred between 7,000 years and 4,000 years ago favored the development of peat bogs rather than the survival of forests, the deforestation was more likely the result of natural processes than of human activity.
In the ecologist’s argument, the two portions in boldfaces play which of the following roles?
分析A选项
分析B选项
分析C选项
分析D选项
分析E选项
我有更好的解析 
暂无雷哥网文字解析
B1是证据，AB对
2.B1B2无转折（都在however后面），B对
雨雨
12 都用于作者对观点的反驳：reject A：错在对第二句的理解错误，第二句也是对argument的反驳
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2019-03-11 10:15:42
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逻辑CR
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71.4%
平均正确率
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