TF阅读真题第815篇Archaeopteryx and Bird Evolution

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TF阅读真题第827篇The Theory of Geographic Speciation

Sources of Prosperity during China's Song Dynasty     In the tenth century. after a period of political fragmentation, China began to enjoy a peaceful and prosperous per...

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TF阅读真题第808篇Effects of Plate Tectonics on Species

Mycorrhizae     Fungi are organisms, including mushrooms, yeasts, and molds, that absorb and decompose organic material. Most land plants have specialized roots that con...

TF阅读真题第800篇Ocean Currents

TF阅读真题第826篇Habitat Selection by Birds

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...