TF阅读真题第734篇The Sound Revolution in American Film

TF阅读真题第725篇Forest Management in the Blue Mountains

TF阅读真题第702篇Early Production of Paper in Europe

TF阅读真题第714篇Origin of Comets

  During the European Renaissance (1300-1600)， artists in Florence, Italy, made striking use of oil-based paints, but the development of these paints was part of a long and c...

TF阅读真题第731篇The History of Writing Technology in Europe

Woody plants produce a great variety of chemical compounds to provide protection against other plants, diseases, and herbivores (plant-eating animals) big and small. These chemical...

TF阅读真题第686篇Physiological Adaptations of Tuna

  Migratory birds are well known to navigate over long distances between feeding grounds and breeding sites, often over thousands of miles. Ornithologist G. V. T. Matthews dem...

TF阅读真题第728篇Europe's Economic Recovery in the Fifteenth Century