TF阅读真题第829篇Expansion of the Inca Empire

题目： Gordon Childe and the Neolithic Revolution   V. Gordon Childe (1892-1957) was one of the most influential archaeologists of the twentieth century, perhaps best known f...

TF阅读真题第838篇Germanic Invasions of the Roman Empire

TF阅读真题第803篇London’s Second-Century Decline

Coal's Rise and Fall Changes in the use of coal over time are reflected in the environment. In the eighteenth century most peppered moths had black spots on white wings, but in th...

The Global Industrial Revolution   题目：   In fewer than a hundred years, the global process of industrialization utterly transformed Great Britain, most of continenta...

TF阅读真题第805篇Concealing Coloration

  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 ...

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...

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...