金屬我係指緊鐵,銅,鋁
我知道數量越少,價格就會越高
但係唔明生產成本係指咩同埋點影響商業價格
原本條問題係咁既::
describe the relationship between the commercial prices of common metals(iron, copper, aluminium), their actual abundances and relative costs of production.
咁我應該點答呢??
收錄日期: 2021-04-13 17:25:35
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20100422000051KK01100