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721篇The Waterfall Environment

Opera in Seventeenth-Century Venice     Opera, a form of drama set to music and featuring vocal performance supported by an orchestra, was born in Italy at the very end ...

Horns in Beetle Competition       Intraspecific competition-that is, competition between members of the same species for limited resources-can be a complex phenome...

    题目： Transportation and Economic Change in the Nineteenth-Century       Between 1820 and 1860,the American economy entered a new stage of develop...

TF阅读真题第683篇The Solnhofen limestones and Archaeopteryx

TF阅读真题第729篇Forming the Building Blocks of Life

  Bartering was a basic trade mechanism for many thousands of years; often sporadic and usually based on notions of reciprocity, it involved the mutual exchange of commoditi...

TF阅读真题第698篇European Cities and the Rise of Commerce