回复：钱学森给本科生的期终考题

来源: 于 2010-01-11 12:15:33 [旧帖] [给我悄悄话] 本文已被阅读：次

Are you sure this question was from 钱学森? If it was,钱was not a good Prof.,though he was a great scientist.
Question is not clear.