TF阅读真题第853篇Climate and the Ancient Sahara

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

TF阅读真题第815篇Archaeopteryx and Bird Evolution

Why Did Agriculture Arise   Sometime around 10,000 years ago, some hunter-gatherers took up agriculture. Though the advantages may seem obvious, there are also disadvantages: ...

题目： Submerged Plant Life:Surviving Underwater   Whereas a land plant expends a great deal of energy on the production of roots that can forage in the soil for vital water ...

题目： Biological Rhythms     Biologists have identified many types of biological rhythms, including daily, monthly, and annual rhythms. Among many animals, physiologic...

  Part 1 READING PASSAGE 1 Read the text on the next page and answer Questions 1-13. Prison: The Solution or the Problem? In the Netherlands and parts of the USA such as Jo...

  Agricultural Practices of the Maya   题目：     The Maya civilization flourished for centuries on the Yucatan Peninsula and other areas of Mesoamerica, reac...

  题目： French Gothic Cathedrals Gothic-style cathedrals, known for their impressive height. pointed arches, and intricate line patterns, are among the most elaborate s...

题目： The Emergence of the State Before there was agriculture, people lived in small, loosely organized bands or tribes that hunted for and collected food in the wild. The emerg...