单词：iron-smelting technology
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48. smart 1)He is a smart businessman. 2)The dentist's drill left his tooth smarting. 3)They were all hungry, and the food smelt good. 4)It's a small world.
李阳疯狂英语突破口语100要素
THE AGES OF MAN Human achievements come in all shapes and sizes. Knocking two rocks together can be just as important as sending a man to the moon. When ancient humans learnt to use stone tools and make fire, it meant the beginning of modern society
人教高中英语高二
The ages of man Human achievements come in all shapes and sizes. Knocking two rocks together can be just as important as sending a man to the moon. When ancient humans learnt to use stone tools and make fire, it meant the beginning of modern society.
高中英语听力人教版第二册
Farming by GPS Saves Money, Environment Mixing tradition with technology On a weedy patch of land an hour and half from Washington, D.C., farmer Brad Eustace is tilling razor-straight lines with a GPS-guided tractor. With the computer in control, he
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Lesson 64 The Red Metal Called Copper 第64课 红色金属铜 There is only one metal which is red in colour. Its name is copper. On the shores of Lake Superior in North America, lumps of pure copper are found in the rocks; but in Cornwall , and in
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The Streaming down the Yangtze team has arrived in the city of Tongling, Anhui Province. Owing to its copper deposits, it was an important center in ancient China for bronze production. The scale of the copper industry has gradually increased and it
2018CRI中国国际广播电台