题目

        Do you love running? It is a good exercise, yet many people find it boring. But what if making your morning jog a creative one? Like jumping from walls and over gaps, and ground rolls? Just like the James Bond in the movie Casino Royale？Bond jumps down from a roof to a windowsill and then runs several blocks over obstacles on the way. It is just because of Bond's wonderful performances that the sport has become popular worldwide.     Yes, that's parkour, an extreme street sport aimed at moving from one point to another as quickly as possible, getting over all the ob13、（2+x）3的展开式的第三项的系数是 6．