我国对于涉外成套设备供应合同，如当事人未选择合同所适用的法律，一般适用()。
A、设备安装运转地的法律A
暂无解析
Johngotbeateninthegame,____hadbeenexpected.
Notreally.Itisshrewdbusinessoperations.
Whatisthemainadvantageofradioads:（）
Intheearlieststagesofman'sdevelopmenthehadnomoreneedofmoneythananimalshave.Hewascontentwithverysimpleformsofshelter,madehisownroughtoolsandweaponsandcouldprovidefoodandclothingforhimselfandhisfamilyfromnaturalmaterialsaroundhim.Ashebecamemorecivilized,however,hebegantowantbettershelter,moreefficienttoolsandweapons,andmorecomfortableandmorelastingclothingthancouldbeprovidedbyhisownneighborhoodorbytheworkofhisownunskilledhands.Forthesethingshehadtoturntotheskilledpeoplesuchassmiths,leatherworkersorcarpenters.Itwasthenthatthequestionofpaymentarose.
Atfirsthegotwhathewantedbyasimpleprocessofexchange.Thesmithwhohadnotthetimetolookafterlandorcattlewasgladtotakemeatorgrainfromthefarmerinexchangeforanaxeoraplough.Butasmoreandmoregoodswhichhadnofixedexchangevaluecameonthemarket,exchangebecametoocomplicatedtobesatisfactory.Anotherproblemarosewhenthosewhomadethingswantedtogetstocksofwoodorleather,oriron,buthadnothingtoofferinexchangeuntiltheirfinishedgoodswereready.Thusthedifficultiesofexchangeledbydegreestotheinventionofmoney.Insomecountrieseasilyhandledthingslikeseedsorshellsweregivenacertainvalueandthefarmer,insteadofpayingthesmithforanewaxebygivinghimsomemeatorgrain,gavehimsomanyshells.Ifthesmithhadanyshellsleftwhenhehadboughthisfood,hecouldgetstocksoftherawmaterialsofhistrade.Insomecountriesquitelargethingssuchascowsorcamelsorevenbigflatstoneswereusedfortrade.Later,piecesofmetal,bearingvaluesaccordingtotherarityofthemetalandthesizeofthepieces,orcoinswereused.Moneyasweknowithadarrived.
1.Exchangeofgoodsbecamedifficultbecause_________.
Amanbecamemorecivilized
Bsmithsbegantolookafterlandorcattleintheirsparetime
Cmoreandmoregoodswhichhadnofixedexchangealuescametothemarker
Dfarmershadn'tenoughgrainormeattoprovidefor
skilledworkers
2.Moneywasnotuseduntil_______.
Apaperwasinvented
Bpeoplepracticedasimpleprocessofexchange
CnothingcouldbeofferedinexchangeDtheexchangeofonethingforanotherbecametoocomplicated
3.Thebesttitleforthispassageis_____.
AWhatismoney
BWhataremoney'sfunctions.
CTheimportanceofmoney
DThebeginningofmoney
Yourfullcooperationinthisrespectwillbehighly____.
