Extraterrestrial lmpact and Megafauna Extinctions     About 13,000 years ago, near the end of a period called the Pleistocene, North America was populated by megafauna (...

TF阅读真题第804篇Changes in United States Cinema

Life on Mars Astronomers strongly suspect that Mars currently has no liquid water, diminishing the chances for life there now. But running water and a denser atmosphere in the pas...

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The History and Composition of Laundry Detergent     The earliest ancient people used plain water for cleaning. Water can dissolve different kinds of substances and then...

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

The Greenhouse Effect on Venus   The nitrogen and oxygen gases that make up the bulk of Earth's atmosphere neither absorb nor emit thermal radiation, energy that is released f...

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

综合写作： 写作真题第220套（rs140）听力音频 https://mp.weixin.qq.com/s?__biz=MzI2NzA4MDMwNA==&mid=2247522646&idx=2&sn=53dbb4dd42ea2b93e84521f827a69eae&scene=21#...

  Part 1 READING PASSAGE 1 Read the text on the next page and answer Questions 1-13. Prison: The Solution or the Problem? In the Netherlands and parts of the USA such as Jo...