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Unit 3 Computers 基础落实 .高频单词思忆 1.The development of the steam engine was a great (科技的) advance. 2.I havent (计算) the result of the maths problem. 3.Life (完全地) changed when I went to college. 4.People will build a large (人造 的) lake in the new park. ,technological,calculated,totally/completely,artificial,