so that info

so thatコンテンツ一覧

同志社大学（文）１
　　Although the nineteenth century was an era of steam, the last quarter of the century saw electricity come into its own as a source of power and of light. Whether the source of power was steam or electricity, it was dependent upon coal, so that this period was one of great expansion and development...
続きを読む

▲このページのトップへ