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TF阅读真题第929篇Where Did the Carbon Go?
Where Did the Carbon Go? Over the last several hundred thousand years, atmospheric carbon dioxide (CO2) levels decreased when Earth's glacial ice sheets were ...
TF阅读真题第748篇The Origin of the K-T Asteroid
It is now generally accepted that dinosaurs (and large numbers of other animals and plants) went extinct about 65 million years ago, when Earth was hit by a giant asteroid (a rocky...
TF阅读真题第851篇The Rise and Spread of Japanese Woodblock Prints
TF阅读真题第851篇The Rise and Spread of Japanese Woodblock Prints
TF阅读真题第873篇Debating the Agricultural Diet
Debating the Agricultural Diet An affluent society is one in which resources are ordinarily not scarce and most society members have achieved a general level of econ...
TF阅读真题第903篇Life on Mars
Life on Mars Astronomers strongly suspect that Mars currently has no liquid water, diminishing the chances for life there now. But running water and a denser atmosphere in the pas...
