Followed by assembly line: which free people from daily manual labor
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送交者: 粪青 于 2009-01-30, 11:07:02:
回答: I'd say stock market and democracy is the most important American inventions 由 粪青 于 2009-01-30, 11:04:08:
which lead to free time for ordinary folks, as such, service becomes the most important industry
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