在催化剂预硫化过程中只有在切换VGO后才能启动注水泵向高压空冷系统注水。
参考答案:对
Is there ____ in today's show? [ ]
A. something interesting
B. interesting something
C. interesting anything
D. anything interesting
碳化钙与水反应生成()和氢氧化钙。