TF阅读真题第688篇Uniformitarianism and Earth's Cycles

TF阅读真题第720篇The Sogdians and the Silk Road

第752篇Underground Water

Proto-industrialization in Europe     The wealthy merchants of the early modern era (approximately 1500-1800)took commodities(products) made by others and shipped them t...

TF阅读真题第816篇Characteristics of Seaweeds

TF阅读真题第848篇Wool production in Europe on the high Middle Ages

TF阅读真题第699篇Transportation and American Development

TF阅读真题第731篇The History of Writing Technology in Europe

TF阅读真题第763篇Methane Hydrate as a Potential Fuel

TF阅读真题第795篇Preventing Water Loss