TF阅读真题第843篇The Sistine Ceiling

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...

TF阅读真题第835篇Sauropod Teeth and Nostrils

Degradation and Erosion of Soil Land without soil can support only very small primitive plants such as lichens and mosses that can cling onto a rock surface. The rest of the worl...

  题目： French Gothic Cathedrals Gothic-style cathedrals, known for their impressive height. pointed arches, and intricate line patterns, are among the most elaborate s...

Archaeological Evidence for Social Complexity   题目：     Ancient human groups that used advanced technology and divided labor into highly specialized roles are c...

Building Materials in the Nineteenth Century       For most of the nineteenth century, European architects built in historical revival styles (styles that imitate ...

  题目： Living-History Museums in the United States       The living-history approach to teaching social history combines restored or re-created historical ...

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...

Creativity   A basic question about creativity is, what factors produce it? Several contrasting answers have been proposed. Cognitive psychologists, for example, have tended t...