题干
| THE FOOD FESTIVAL | |
| Date | April 23,24 and25 |
| Place | Hall 5,International Center |
| Time | April 23: 12:00 a.m.—4:00 p.m. |
| April 24: 10:00 a.m.—3:00 p.m. | |
| April 25: 8:00 a.m.—2:00 p.m. | |
| Price | Adults: ＄12 Seniors(65+): ＄11 Kids under 12: free (when they come with an adult) You can buy tickets at the door or online. All tickets Online are ＄11. |
根据短文内容，选择正确的答案。
Z(g) + M(g) + N(s)进行过程中X的转化率随时间变化的关系。若要改变起始条件，使反应过程按b曲线进行，可采取的措施是 
