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TF阅读真题第797篇The Australlan Megatauna Extinctions
The Australlan Megatauna Extinctions Many of the species of large animals(megafauna) such as mammoths, mastodons, ground sloths, and giant deer that roamed the Earth tens of thous...
TF阅读真题第940篇Transportation and Urban Development in Los Angeles
Transportation and Urban Development in Los Angeles 题目： In the early twentieth century, the key urban problem in the United States was congestion. Streetcars (pu...
TF阅读真题第807篇The Birth of the Solar System
The Birth of the Solar System The Birth of the Solar System 题目： Scientists believe that the sun and the planets in our solar system formed from a vast clo...
TF阅读真题第837篇Changes in Native American Food Production
Changes in Native American Food Production Changes in Native American Food Production 1 Native Americans expanded their sources of food in the centuries around the end of the fir...
TF阅读真题第802篇Effects of Deforestation in Nineteenth
TF阅读真题第802篇Effects of Deforestation in Nineteenth
TF阅读真题第821篇Using Animal Bones to Determine Climates
TF阅读真题第821篇Using Animal Bones to Determine Climates
TF阅读真题第812篇The Roman Aqueduct System
The Roman Aqueduct System Around 300 ʙ.ᴄ.ᴇ., the population of the city of Rome reached half a million and required a solution for its growing water needs...
