题目

Henry works in a factory. He comes from a poor family and was in school for only four years. He has to do the hard work, but he is paid less. He likes to watch football matches very much and spends much time on them. One afternoon there was a big football match on the playground. He borrowed some money from his friend and hurried there. There were a lot of people there. And all the tickets were sold out. He was sorry for it. He saw a pole（杆子）outside the playground and climbed it quickly. A policeman came and said, “It is dangerous to stay on it! Come down!” “Wait a minute, please已知集合M={x|x＞0}，N={x|lnx＞0}，则M∩N=______（填“M”、“N”、“空集φ”）