TR共233篇 第14页
TR
排序
TF阅读真题第812篇The Roman Aqueduct System
The Roman Aqueduct System Around 300 ʙ.ᴄ.ᴇ., the population of the city of Rome reached half a million and required a solution for its growing water needs...
TF阅读真题第883篇The Azolla Event
The Azolla Event During the early Eocene period, about 56 million years ago, Earth's atmosphere had high levels of carbon dioxide(CO2) which warmed the planet. But a...
TF阅读真题第920篇Animal Migration Patterns in the Serengeti
Animal Migration Patterns in the Serengeti The Serengeti, a region in northern Tanzania, is the site of the largest mammal migration on Earth. Herds of wildebeest, zebras...
TF阅读真题第728篇Europe’s Economic Recovery in the Fifteenth Century
TF阅读真题第728篇Europe's Economic Recovery in the Fifteenth Century
TF阅读真题第761篇Oil Painting in Renaissance Florence
During the European Renaissance (1300-1600)， artists in Florence, Italy, made striking use of oil-based paints, but the development of these paints was part of a long and c...
