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

TF阅读真题第842篇Waking Up: Coming Out of Hibernation

Creativity   A basic question about creativity is, what factors produce it? Several contrasting answers have been proposed. Cognitive psychologists, for example, have tended t...

TF阅读真题第850篇The Australian Megafauna Extinctions

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

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

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...

TF阅读真题第820篇The Greek City-States_ Sparta and Athens

TF阅读真题第841篇The Beginnings of Radar Astronomy

  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 ...