尧华村在精神文明建设活动中开展了大量推动当地精神文明建设的活动，如进行先进典型的评比，建立健全多个民间传统艺术组织，在精神文明建设获得累累硕果的同时，文明的村镇引来了八方的投资商，促进了当地经济的快速发展。尧华村为创建文明村镇开展了哪些精神文明创建活动平共处（      ）

   Bob was cutting a branch（树枝） off a tree in his garden. While he was sawing（锯）, another man passed in the street. He stopped and said, “ Excuse me, but if you continue (继续)to saw（锯） that branch like that, you will fall down with it.” He said this because Bob was sitting on the branch and cutting it at a place between himself and the trunk（树干） of the tree.
   Bob said nothing. He thought, “ This is some foolish（愚笨的） person who has no work to do and goes about telling other people what to do and what not to do.”
   The man continued on his way. Of course, after a few minutes. The branch fell and Bob fell with it.
   “My God!” he cried. “That man knows the future!” and he ran after him to ask how long he was going to live. But the man had gone.

装满氧气的集气瓶，按下图所示，用带火星的木条分别甲.乙两种方式迅速插入，发现木条复燃，且在甲中燃烧比在乙中更旺.上述实验说明了氧气具有的性质是：

①____，②____.