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【简答题】
NH 3 与水反应的化学方程式: 氨水中所含微粒有: 、 、 、 、 、 ______ 。
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反馈参考答案：
举一反三
【单选题】Anais Nin's diaries are often scandalous, probably because she describes herself as she is rather than ______ .
A.
others define her
B.
as others define her
C.
her definition by others
D.
she is defined by others
【简答题】B2B 网站的盈利模式有哪些?
【单选题】After the First World War, the author Anais Nin became interested in the art movement known as Surrealism and in psychoanalysis, both______her novels and short stories.
A.
in which the influence
B.
to have influence on
C.
of which influenced on
D.
its influence in
【单选题】若 f 只涉及到 E1 的属性,则σ f(E1 × E2) ≡()。
A.
σ f(E1) × E2
B.
σ f1(E1) ×σ f2(E2)
C.
σ f2( σ f1(E1) × E2)
【简答题】B2B 网站的盈利模式有哪些?
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