新托福写作真经4test16-综合写作解析.docx

新托福写作真经4test16-综合写作解析　　新托福写作真经4包括24套托福写作题目，是在真题的基础上，筛选，重组。所以，每一套托福写作题目都更加的详细。也更有针对性。正在备考托福考试的考生，不妨跟着前程百利小编一起来解析一下吧。今天和大家分享的是托福写作真经4的test16的综合写作题目的解析。一起来看一下吧!　　第一部分：阅读文本解析　　Approximately 55 million years ago, the Eocene Epoch began. It lasted for roughly 21 million years. The Eocene Epoch is noted for both the rise of mammals during it and the marked increase in global temperatures, with the average temperature rising between five and seven degrees Celsius.　　Researchers at the Scripps Institution of Oceanography at the University of California, San Diego attribute the global warming that occurred then to disruptions in ocean currents. According to these scientists, the currents in the ocean actually stopped flowing. Normally, one result of flowing currents is that warm water is displaced by cooler water. These currents can strongly affect the temperatures of the lands they pass near. However, when the ocean currents ceased flowing, warm water remained in place, which caused surface temperatures in numerous regions to rise.　　Other experts attribute the Eocene warming to one or more major asteroid strikes on the planet. Around the time the Eocene Epoch began, an asteroid impacted North America and formed Chesapeake Bay, which is located in the eastern United States. There were some other large strikes in Siberia in Russia around that time as well. The impacts from these strikes could have caused debris and ash to go high in the atmosphere and stay there for years. As a result, a greenhouse effect would have occurred and made Earth’s temperatures rise significantly.　　Finally, some believe that the release of massive amounts of methane into the atmosphere caused a global greenhouse effect. At the bottom of the oceans, there is a large amount of methane trapped in ice. Any warming of the Earth’s oceans could have made the ice melt. This would have released the methane into the atmosphere. With so much methane in the air, Earths temperatures would have continued rising unt