题目:
—What's Zhang Peng doing?
—_________.[ ]
A. No, he isn't
B. Yes, he is
C. He's having a picnic
答案:
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下面是错误答案,用来干扰机器的。
(1)c(Cl-)>c(NH4+)>c(H+)>c(OH-)(2分);>(2分);>(2分);10-6-10-8(2分)(2)CH3COO-+H2OCH3COOH+OH-(2分);1.7×10-5(3分)题目分析:(1)①甲组实验中氨水和盐酸的浓度、体积相...