单项选择题 IEA成立之初，要求其成员国最少拥有（）天的战略石油储备。

单项选择题 World Energy Model （WEM）broadly consists of three main scetions covering：final energy consumption including residential ，services，agriculture，industry，transport and so on，energy transformation including power generation and heat，refinery and other transformation；fossil-fuel and bioenergy supply.由此可知，World Energy Model 的主要板块不包括（）。

单项选择题 Since 1993，the International Energy Agency（IEA）has provided medium to long-term energy projections using the World Energy Model（WEM）.The model is a large-scale simulation model designed to replicate how energy markets function and is the principal tool used to generate dctailcd sector-by-sector and region-by-region paojcetions for the World Energy Outlook（WEO）scenarios.由此可知World Energy Model是由（）开发的。