Itisasadfactoflifethatonlyoneortwopercentofinventeditem...
問題詳情:Itisasadfactoflifethatonlyoneortwopercentofinventeditemsmakemoneyfortheirauthorofthisbookbelievesthiscouldbeincreasedtotenpercentifinventorswereprovidedwithandusedtheinformationavailablenow.Mo...