乙烯直接水合制乙醇的反应速率式为(-rA)=kcA,在300℃,7MPa,有效扩散系数De=7.04×10-4cm2/s,反应速率常数k=0.09s-1,采用球形颗粒5mm催化剂,试问颗粒内扩散影响程度。
第2题
第3题
Monophthongs and diphthongs are two major types of vowels. ()
第4题
here are two types of business negotiations、formal and informal.()
第5题
There are two types of advantages___.
A、absolute advantage
B、total advantage
C、comparative advantage
D、optional advantage
第6题
There are two types of advertising___.
A、product advertising
B、institutional advertising
C、indoor advertising
D、outdoor advertising
第7题
第9题
(b) Briefly explain the two types of informal communication known as the grapevine and rumour. (6 marks)
第10题
Can you________the difference between these two types?
A.answer
B.say
C.talk
D.tell
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