When United States voters elected Herbert Hoover, who had established a worldwide reputation as mining engineer, writer, and war-relief administrator, 31st president in 1928, the country was enjoying an industrial and financial boom.

• 当美国选民于1928年选举赫伯特·胡佛，一个世界著名的矿业工程师、作家和战争亲善官，当美国第三十一任总统时，美国的工业和金融业正处繁荣时期。