TF阅读真题第735篇The Role of Fragrance in Plant Pollination

Characteristics of Tropical Rain Forests Almost all the action in a rain forest (not just photosynthesis but also flowering, fruiting, predation, and herbivory) happens high in t...

TF阅读真题第704篇Air-Breathing Fishes

TF阅读真题第822篇Newspapers in the Nineteenth-Century

TF阅读真题第784篇Proto-industrialization in Europe

Mars's Disappearing Atmosphere   For about the first billion years of its life, Mars was probably a watery planet. There are signs of past water in surface features, such as d...

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...

Dating the Ancient Egyptian Pyramids   题目：   The first step toward discovering the age of the ancient Egyptian pyramids is to determine for whom they were built. Ea...

TF阅读真题第838篇Germanic Invasions of the Roman Empire

  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...