TF阅读真题第703篇Ice Age Triggers

The growing population of eighteenth-century Europe increased demand for cloth to clothe people. Urban merchants turned to rural people for additional, inexpensive labor: farming f...

TF阅读真题第708篇Marsupials

TF阅读真题第720篇The Sogdians and the Silk Road

The sauropod dinosaurs were gigantic, long-necked herbivores (plant eaters) that flourished during the Jurassic period (201-145 million years ago). At the same time that the saurop...

TF阅读真题第732篇Viral Plant Parasites

TF阅读真题第699篇Transportation and American Development

TF阅读真题第715篇Control of the Seas

In the late 1970s, several research groups were trying to determine the cause of the boundary between the geological layers corresponding to the Cretaceous and Tertiary periods, ab...

TF阅读真题第706篇A Revolution in Consumption in the Eighteenth Century