TF阅读真题第687篇The Carboniferous Atmosphere

TF阅读真题第734篇The Sound Revolution in American Film

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691篇Natufians and the Domestication of Grain

TF阅读真题第677篇The Importance of Seed Plants

  When studying an archaeological site, archaeologists must first try to understand how the society that lived there was organized. Some societies are centrally organized, and...

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

TF阅读真题第678篇Telescopes

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

TF阅读真题第737篇Chinampas