TF阅读真题第803篇London’s Second-Century Decline

TF阅读真题第721篇The Waterfall Environment

Diving for Food by Birds     Seabirds are physiologically adapted to dive underwater for food, a strategy that necessarily poses problems. An obvious problem is that whe...

复时间 2022-09-28 2023-12-13 2024-04-13 2025-04-12 Adaptations of Marine Mammals     Warm-blooded marine mammals and birds require some special adaptations to permit t...

TF阅读真题第682篇Early Iron Metallurgy

TF阅读真题第729篇Forming the Building Blocks of Life

  Bartering was a basic trade mechanism for many thousands of years; often sporadic and usually based on notions of reciprocity, it involved the mutual exchange of commoditi...

TF阅读真题第698篇European Cities and the Rise of Commerce

TF阅读真题第815篇Archaeopteryx and Bird Evolution

TF阅读真题第778篇The Evolution of Reptiles and Therapsids