请根据每题所提供的图画情景和提示词 (要求全部用上)，写一个与图画情景相符的句子。

           1                         2                               3                          4                           5

1. ________________________________________________ (it, today)  

2. ________________________________________________ (Jane, like)  

3. ________________________________________________ (it, good) 

4. ________________________________________________ (Mary, Chinese)   

5. ________________________________________________ (they, now)

简述“首次蓄水期”、“初蓄期、”“运行期”。