送交者: meiyou 于 2009-01-30, 10:51:11:

回答: U didn't mention remote-control, surveyed as most important gadget for men 由 粪青 于 2009-01-30, 10:15:19:

• I'd say stock market and democracy is the most important American inventions - 粪青 (29 bytes) 2009-01-30, 11:04:08 (296314)
  • Followed by assembly line: which free people from daily manual labor - 粪青 (96 bytes) 2009-01-30, 11:07:02 (296317)

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