下列关于哲学与世界观的关系认识正确的是（   ）

已知集合M={0，1，3}，N={x|x=3a，a∈M}，则M∪N=（　　）

欧阳询的字点画工妙，骨硬肉丰。古人评价其字的笔画“ （斜钩）”具有“险而劲”的特点。请你欣赏下面欧阳询的《九成宫醴泉铭》选帖。

《九成宫醴泉铭》选帖

下面是古人评价书法的四句话。根据这幅字帖的特点，判断其中属于评价欧阳询《九成宫醴泉铭》书法作品的一项是（    ）

以下环境问题中属于生态破坏问题的是                （ ）

    O. Henry was a pen name of an American writer. He wrote short stories. His real name was William Sydney Porter. He was born in North Carolina in 1862. As a young boy he lived an exciting life. He did not go to school for very long, but he tried to teach himself everything he needed to know. When he was about 20 years old, O. Henry went to Texas. There he tried different jobs. He first worked on a newspaper, and then had a job in a bank. When some money was lost from the bank, others believed O. Henry took it. So people sent him to prison﹡. He stayed in prison for three years. There he learned to write short stories. After he got out of prison, he went to New York and went on writing. He wrote mostly about New York and the life of the poor there. People liked his stories, because they always finished with a sudden change at the end, to the reader's surprise.