水分子是H2O而不是H3O，是因为共价键具有性；水分子

水分子是H₂O而不是H₃O，是因为共价键具有性；水分子的键角接近90 °是因为共价键具有性。

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饱和　方向

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水分子是H2O而不是H3O，是因为共价键具有 性；水分子

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水分子是H2O而不是H3O，是因为共价键具有性；水分子