题目

From the first use of the rocket to carry satellites into space to the setting up of space stations, human beings have been putting great effort into space research. And so far, we have achieved many successes. But there are still numerous tasks in front of us and we should not stop trying to progress.The international space station (ISS) is an important step we should take in space exploration. It is not only helpful but also essential. It provides a proper space environment for many experiments that we have wanted to do for a long time. It is also a base for the observations of the earth and阅读材料，回答问题．材料一：我国东南沿海铁路线分布示意图．材料二：2010年5月，以“城市，让生活更美好”为主题的世博会将在上海举行． （1）上海位于 ________入海口，地处长三角经济区，试分析其发展的有利因素． （2）图中铁路线甲的名称是________线，正在兴建的杭州到深圳的沿海铁路自北向南依次经过沿海三省，其中C省的简称是_______． （3）图中所示城市的分布规律是 ________