如果炉出口温度过高,(),(),并促进加氢裂化反应.
参考答案:反应温度高;催化剂结焦
Last month, our English Department invited a local radio star to _____ a public lecture on the topic of media
influence on society. [ ]
A. communicate
B. demand
C. deliver
D. converse
根据性质和作用方式抗蒸腾剂可分为哪三类?