上册readingPeriod1高二英语课件
日期：2010-12-20 12:49
Who is the father of these inventions?electric railwayThe first electric railway was built by
German Werner von Siemens in 1879light bulbThe electric light bulb was invented by
Thomas Alva Edison in the United States
in 1879steam-powered
boat
The first steam-powered ship was developed by，
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