STAF框架与物流动力学框架的主要共同点( )Which of the following describes the main common points the two MFA frameworks( )
A.
都考虑了区域间贸易 B oth considered interregional trade
B.
都考虑了物质在使用过程中的存量 B oth considered the material in-use stock
C.
都依据物质守恒定律进行定量分析 B oth are based on the law of conservation of mass to analyze material flows
D.
都显化了产品生产到报废之间的时间差 T he time difference between product production and the end of life is demonstrated in the two frameworks