Molt is the process in which birds shed feathers and replace them by growing new ones. It is a costly effort that typically follows breeding in the warmest months of the year and p...

TF阅读真题第697篇China's Twelfth-Century intellectual Influence on japan

TF阅读真题第814篇Agriculture in Colonial New England

TF阅读真题第777篇Fishing in Early Egypt

The American Hospital     Few institutions have undergone as radical a transformation as the hospital has in its modern history. It is perhaps distinctive among social i...

The Greenhouse Effect on Venus   The nitrogen and oxygen gases that make up the bulk of Earth's atmosphere neither absorb nor emit thermal radiation, energy that is released f...

题目： Gordon Childe and the Neolithic Revolution   V. Gordon Childe (1892-1957) was one of the most influential archaeologists of the twentieth century, perhaps best known f...

TF阅读真题第831篇Jupiter's Moon lo

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...

The special character of the Nile, which made it central to ancient Egyptian culture, was its annual inundation (flooding). During June the river began to rise, and a quantity of g...