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  China’s Zhou Yang won the Olympic Games women's 1,500-metre short-track gold in 2009. “I told myself a few days ago ‘Zhou Yang，you Can do this’”the18-year-old Olympic newcomer said. “I believed in myself. ”    “This gold medal will change things. It will give me more confidence. It will give my mum a better lifestyle. ”     China’s Shen Xue，aged 31，and Zhao Hongbo，aged 36， celebrated St. Valentine’s Day and the Chinese New Year by winning a gold medal in the pairs figure skating at the Vancouver Olympics . —“We have not competed(比赛) much如图，已知a∥b，∠1=140°，则∠2=    ．