下列离子方程式的书写正确的是( )
A:硫化钠水解:S2﹣+2H2O⇌H2S↑+2OH﹣
B:硫氢化钠水解:HS﹣+H2O⇌H3O++S2﹣
C:硫化钾水解:S2﹣+H2O═HS﹣+OH﹣
D:硫酸铝溶液跟偏铝酸钠溶液反应:Al3++3AlO2﹣+6H2O═4Al(OH)3↓
对于生活中有关光现象,下列说法不正确的是( )
若 ,则 ____.
读一读,连线。
①What can you see?____ A. It's green.
②What colour is it?____ B. OK, Mum.
③Put the box on the desk. ____ C. Yes, please.
④Chopsticks?____ D. I can see a slide.