①常温在C(H⁺)/C(OH^-)= 10^-10溶液中：K⁺、Na⁺、CH₃COO^-、SO₄^2﹣

②常温pH=11的溶液中：CO₃^2﹣、Na⁺、AlO₂^﹣、NO₃^﹣

③水电离出的H⁺浓度c(H⁺)=10^﹣12mol•L^-1的溶液中：Cl^﹣、NO₃^﹣、Na⁺、S₂O₃^2﹣

④使甲基橙变红色的溶液中：Fe³⁺、NO₃^﹣、Na⁺、SO₄^2﹣

— Does he like singing?

— No,he doesn't. He likes ____.

    Once there was a father and a son. They were ill-tempered (坏脾气的) and1gave way to others.

    One day the father2to ask some friends to dinner in his house. He 3his son to buy some meat in town. 4the son walked towards the town gate, a man was coming from the outside. The gate wasn't5 enough to let two men in and out at the same time. But neither of 6would give way to the other.

    They stood straight face 7 face inside the gate hour after hour. But the father was8. "What shall I do? My son hasn't 9 yet. I can't wait any more." He wanted to know what was the10with his son. So he 11 his friends at home, and went to town 12his son.

    "You may first take the 13 home for my friends. Let me 14 here against him instead." he said to his son when he knew 15had happened.

画一画。

①

四千三百六十

②

3506

③

五个千四个十