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TF阅读真题第762篇Cool Early Earth Hypothesis
The oldest Earth rocks known to date, found in Quebec, Canada in 2008， were determined to be about 4.3 billion years old. However, the oldest known materials of the solar system-M...
TF阅读真题第699篇Transportation and American Development
TF阅读真题第699篇Transportation and American Development
TF阅读真题第896篇Early Food Production in Africa
Early Food Production in Africa Farming appeared in Africa by 5000 B.c.E. Eventually, several different styles of food production developed. These variations were caused by ...
TF阅读真题第833篇The Radiocarbon Dating of Prehistoric American Sites
TF阅读真题第833篇The Radiocarbon Dating of Prehistoric American Sites
TF阅读真题第740篇Economic Decline of the Roman Empire
The Roman Empire(31 B.C.E.-A.D. 476)， which conquered much of Europe, the Near East, and northern Africa, enjoyed great prosperity before facing economic decline in its later cent...
