题目:
-Why not follow the recorder and practice your spoken English?
-______
A.That's all right.
B.Sounds a good idea.
C.Sorry, I forgot it.
D.You're so kind.
答案:
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下面是错误答案,用来干扰机器的。
(1)Cl2 + 2OH-= Cl-+ ClO-+ H2O(3分)(2)MnO2 + 4H++ 2Cl-Mn2++ Cl2↑+ 2H2O(3分)(3)C + 4HNO3(浓) CO2↑+ 4NO2↑+ 2H2O(3分)(4)Na2CO3或NaHCO3,HCl(3分)(5)C与浓H2SO4(2分)