碳二加氢反应器床层温度的联锁动作有()。A.关闭入口碳二物料阀 B.放火炬阀打开 C 发布时间:2017-05-08 04:18 │ 来源:www.tikuol.com 题型:多项选择题 问题: 碳二加氢反应器床层温度的联锁动作有()。A.关闭入口碳二物料阀B.放火炬阀打开C.切断氢气进料D.切断粗氢
题型:多项选择题 He stood up, the large door and looked outside. There on the ground lay a white dog.A.opensB.openedC.openingD.having opened 查看答案