dative,disjunctive

呈现为na-,b片段是呈现bh3,从而na与b形成的是na:╟→b配位键(dative
i accusative是宾格, 相当于英语中的him her me dative也算是宾格
caplan carbin rese nese mrmn srsr nominative accusative dative
1 formation of covalent bonds 8.2 dative covalent bonds 8.
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