Itisasadfactoflifethatonlyoneortwopercentofinventeditem...
问题详情:Itisasadfactoflifethatonlyoneortwopercentofinventeditemsmakemoneyfortheirauthorofthisbookbelievesthiscouldbeincreasedtotenpercentifinventorswereprovidedwithandusedtheinformationavailablenow.Mo...