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Intuitively, something is considered to the matter if, and only if, there is mass along with energy and/or momentum associated with it. In other words, possession of mass along with energy and/or momentum is regarded as (i)________, rather than (ii)________, property of matter.
- Blank(i)
- an optimal
- an essential
- a contingent
- Blank(ii)
- a unique
- an irreducible
- an accidental
an essential , an accidental 显示答案
以上解析由 考满分老师提供。
