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一、从文中找出下列句子,分析它们是限制性定语从句还是非限制性定语从句 1.Mao Zedong wrote a poem in which he dreamed of “walls of stone to hold back clouds and rain till a smooth lake rises in the narrow gorges”. 2.The power of the Yangtze River,which is the world’s third longest river,has been harnessed by the Three Gorges Dam. 3.The Three Gorges Dam,which is the biggest construction project in China since the building of the Great Wall and the Grand Canal,has been built to control flooding and provide hydro-electric power for the central region of China.