TF阅读真题第854篇Why Did Social stratification Emerge

TF阅读真题第835篇Sauropod Teeth and Nostrils

TF阅读真题第808篇Effects of Plate Tectonics on Species

Science and Nineteenth-Century Visual Arts     In the middle of the nineteenth century, rapid developments in the sciences and popular fascination with recent technologi...

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843篇The Sistine Ceiling

TF阅读真题第842篇Waking Up: Coming Out of Hibernation

Britain's Industrialization     The Industrial Revolution was an extended period of economic growth and change brought about by the application of mineral energy and t...

Horns in Beetle Competition       Intraspecific competition-that is, competition between members of the same species for limited resources-can be a complex phenome...

  Sunspot Cycles   Dark regions on the Sun, called sunspots, were studied in 1610 by Galileo, who turned the newly invented telescope on objects in the sky. A lively deba...