【单选题】If one of your research staff announced that he had worked out a way to propel a vehicle on a cushion of air, would you tell him to concentrate on something practical, or suggest taking it further? If...
【简答题】(M=Man W=Woman) W: If you had one million dollars, what ___________ you do? M: I would buy a small island, build a house there, and invest the rest of my money so that I would never have to ________...