- 搜標(biāo)題
- 搜題干
- 搜選項(xiàng)
單項(xiàng)選擇題
下列反應(yīng)中，氮元素被還原的是（）
A.2NO
B.N2+O2→2NO
C．2NO2→N2O4
D．3Mg+N2—→Mg3N2
B.N2+O2→2NO
C．2NO2→N2O4
D．3Mg+N2—→Mg3N2
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問答題
5-30 (g) Examine sales invoices for the last five sales transactions recorded in the sales journal in 2019 and examine shipping documents to determine they are recorded in the correct period.
答案：
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