题干
-- Excuse me, I want to buy some stamps. Where can I find a post office?
-- I know ______ not far from here. You can find ______ without difficulty.
-- I know ______ not far from here. You can find ______ without difficulty.
A：that; it
B：it; one
C：one; it
D：it; that
答案(点此获取答案解析）
C
2 Z(g)＋a Q(g)。2 min达到平衡时生成0.8 mol Z，测得Q的浓度为0.4 mol/L，下列叙述错误的是