By Yimou Lee and Sarah Wu TAIPEI (Reuters) -China furiously condemned the highest-level U.S. visit to Taiwan in 25 years as House of Representatives Speaker Nancy Pelosi hailed the self-ruled island as “one of the freest societies in the world” and pledged American solidarity. Beijing demonstrated its anger with Pelosi’s presence on an island that it says is part of China with a burst of military activity in surrounding waters, summoning the U.S. ambassador in Beijing and halting several agricultural imports from Taiwan. Some of China’s planned military exercises will take place within Taiwan’…