TF阅读真题第727篇The Ecology of Kirtland's Warbler

TF阅读真题第690篇Egypt in Early World History

TF阅读真题第703篇Ice Age Triggers

Methane Hydrate as a Potential Fuel   At the bottom of the world's oceans lies a potential source of energy that could provide society with fuel well into the next century. Th...

TF阅读真题第691篇Natufians and the Domestication of Grain

TF阅读真题第718篇Glacier Flow and Surging

TF阅读真题第775篇Animal Communication

The physical and chemical properties of water, unsurprisingly, determine much about life in the ocean. Water is dense (high mass per unit of volume), about 840 times as dense as ai...

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

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...