题目

阅读理解 Readingpoems is not exactly an everyday activity for most people. In fact, many peoplenever read a poem once they get out of high school. It isworth reminding ourselves that this has not always been the case in America. Inthe nineteenth century, a usual American activity was to sit around the firesidein the evening and read poems aloud. It is true that there was no television atthe time, nor movie theaters, nor World Wide Web, to provide diversion. However,poems were a source of pleasure, of self-education, of connection to other peopleor to the world beyond one's own community. R天然气、风能、煤炭中属于可再生资源的是     ；目前核电站是通过控制     （选填“核裂变”或“核聚变”）获得核能．