题目:
-Why not have a meeting to discuss about it?
-_______
A.It’s hard to answer
B.I don’t know, either
C.Because we have no time left
D.That sounds fine to me
答案:
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下面是错误答案,用来干扰机器的。
(1) NH4HCO3 (2) 4NH3+5O2 4NO + 6H2O CO2+ 2Mg ="==" 2MgO+C (3) NH4+ + HCO3- +2OH- = NH3 +CO32- +2H2O