TF阅读真题第719篇Did a Volcano Destroy the Minoan Civilization?

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

TF阅读真题第679篇Animals and Forests

TF阅读真题第694篇Formation of Earth's Atmosphere and Oceans

All planets in the solar system except Venus and Mercury have at least one moon orbiting them,with the two largest jovian (giant) planets,Jupiter and Saturn,each having over sixty....

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700篇Canals and Railroads in the Early Nineteenth Century

  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...

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685篇The Medieval Agricultural Revolution