（1）25℃，在0.10mol•L^﹣1H₂S溶液中，通入HCl气体或加入NaOH固体以调节溶液pH，溶液pH与c（S^2﹣）关系如图（忽略溶液体积的变化、H₂S的挥发）．

（1）硫化氢的电离方程式为　 ____．

（2）往硫化氢溶液中加入少量的盐酸，硫化氢的电离平衡向 ____（“左”或“右”）移动．

（3）当调整溶液至pH=13时，请回答下列问题：

①c（S^2﹣）= ____　．此时溶液中的c（H₂S）+c （HS^﹣）= ____　．

②已知K_a1=$\frac{c\left(H^{+}\right)c\left(HS\right)}{c\left(H_{2}S\right)}$=1.3×10^﹣7，溶液中的离子浓度之间的关系为c （Na⁺）+c （H⁺）=c （OH^﹣）+2c （S^2﹣）+c （HS^﹣）．则c（Na⁺）= ____　（计算近似准确值）．

图示为某地地质剖面图，图中①为沉积物，②~⑧为岩石。读图，回答下列问题。

如图所示，把一个不带电的枕型导体靠近带正电的小球，由于静电感应，在a，b端分别出现负、正电荷，则以下说法正确的是（　　）

短文阅读。    We have four seasons. They are spring, summer, autumn and winter. In spring, there are many flowers and green trees. I can play on the grass with friends. In summer, it's hot. I can swim in the sea and eat ice-cream. I like summer. In autumn, Farmers are busy. We can eat moon cakes in autumn. But I like winter best. In winter, it's cold. Sometimes it snows. I often skate in winter. Sometimes I make a snowman.
⑴~⑹Read and judge.读一读，判断对错。⑺完成表格。

读下面两幅图答题