事故预防有哪些主要措施?
参考答案:
安全技术措施;教育培训措施;管理措施。
There a meeting tomorrow afternoon.
A. is going to be B. is going to have C. are going to be
反应系统硫化催化剂时应注在()。
A.加热炉入口;
B.加氢裂化反应器出口;
C.空冷前。