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TF阅读真题第956篇Archaeoptertx and Flight
Archaeoptertx and Flight 题目： It is not known whether Archaeopteryx, the earliest birdlike creature for which fossils have been found, could fly-but it probably did, at ...
TF阅读真题第939篇Indigo
Indigo 题目： Indigo is a blue dye produced from plants of the genus group Indigofera, grown in tropical and subtropical climates, and it has been highly valued since ancie...
TF阅读真题第936篇The Key Factors Influencing Soil Formation
The Key Factors Influencing Soil Formation Soil is the product of the complex interplay of several factors. Weathering, a process that breaks down rocks by physical (mechani...
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832篇Canals and Railroads in the Early 19th
TF阅读真题第832篇Canals and Railroads in the Early 19th
TF阅读真题第908篇The Search for the Origins of Writing
The Search for the Origins of Writing Who invented the first writing? Like many questions of its type in archaeology, this one is not easily answered. Some might arg...
