Select a vital nonrenewable or exhaustible resource( water, mineral, energy, food, etc.) for which your team can find appropriate world-wide historic data on its endowment, discovery, annual consumption, and price.

 
  • 选择一个至关重要的,但不能再生或者用得尽的资源(,矿物质,能源,食品,等等)你的队需要找到一些关于它的蕴藏量,已发现储量,每年消费额和价格的数据,这些数据应该是适合世界范围的、历史意义的。
今日热词
目录 附录 查词历史