题型:问答题 简答题 开车阶段,由冷火炬切换到热火炬的条件有()。A、确认气化炉点火已成功且煤气中氧含量分析小于0.4%;B、空气运行已稳定操作30分钟且气化炉压力已提至0.4MPa(g);C、空气流量已调整至约3000-4000Nm3/h且蒸汽流量也已作相应的调整。D、21-P001已启动起来。 查看答案
题型:问答题 简答题 —Do you know _____ for Shanghai last night?—At 9:00. [ ]A. what time he leaves B. what time does he leave C. what time he left D. what time did he leave 查看答案