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【简答题】
在没有催化剂时，反应：2H2O2(l) = 2H2O(l) + O2(g)的活化能为75 kJ·mol-1。当有Fe作为催化剂时，该反应的活化能就降低到54 kJ·mol-1。计算在298.15K时，此两种反应的速率的比值k2/k1为： 。（计算结果保留3位有效数字）
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皮皮学刷刷变学霸
举一反三
【简答题】• I give you my word as a soldier, I
will not harm you. The sword is
blunt(钝的), but you must not flinch(哆嗦).A. Bathsheba Everdene B. Gabriel
Oak C. William Boldwood D. Sergeant
Francis Troy
【单选题】I give you my word, I mean what I say, ____________ you come any nearer, I will fire.
A.
that if
B.
if
C.
what if
D.
that
【单选题】I'Il never be unfaithful again. I give you my solemn word.
A.
serious
B.
true
C.
revengeful
D.
responsive
【单选题】I give you my word as a soldier, I will not harm you. The sword is blunt, but you must not flinch.
A.
Hidden Figures
B.
The Blind Side
C.
Green Book
D.
Far From The Madding Crowd
【单选题】I’ll never be unfaithful again. I give you my solemn word.
A.
serious
B.
true
C.
revengeful
D.
responsive
【多选题】Ralph founded a toy business, Raleigh's, many years ago. Although Ralph used to keep firm control in the early days, recently he has been happy to delegate authority to a vibrant new team of toy enthu...
A.
Fixing the date and time of a meeting
B.
Giving immediate rulings on points of dispute
C.
Acting on decisions made
D.
Being seen to be impartial
【单选题】下列关于物质跨膜运输的叙述，不正确的是（）
A.
主动运输过程中，需要载体蛋白协助和ATP提供能量
B.
在休眠或衰老的细胞中，还进行葡萄糖的跨膜运输
C.
质壁分离过程中，水分子外流多于内流导致细胞液浓度升高
D.
分泌蛋白的分泌过程中，囊泡膜可能成为内质网膜的一部分
【单选题】U206 I'll never be unfaithful again. I give you my solemn word.
A.
serious
B.
true
C.
revengeful
D.
responsive
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