TF阅读真题第737篇Chinampas

    How the First People Got to the Interior of North America   Most researchers believe that the first people to come to North America came from Asia to what is no...

TF阅读真题第705篇Freehold Society in Colonial New England

TF阅读真题第820篇The Greek City-States_ Sparta and Athens

TF阅读真题第785篇Mate Choice in Birds

The Early Iron Age     During the Bronze Age (roughly 3300-1200 B.C.E. in the Middle East), civilizations were limited in their use of iron. Most iron occurred not in ...

Indigo   题目： Indigo is a blue dye produced from plants of the genus group Indigofera, grown in tropical and subtropical climates, and it has been highly valued since ancie...

题目： The Fur Trade and Native Americans Soon after Europeans made contact with the aboriginal peoples of North America, known as Native Americans, trading became the focus of ...

TF阅读真题第839篇Money in the European Middle Ages

  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...