Please give an example of trade between two countries that is based on the differentiated products
What is the trade basis expressed by the preference similarity theory?
We cannot predict the direction in which the trade flows by Linder’s theory.
A. 对
B. 错
下列说法中正确的是
A. 活化能与反应物本性无关,而与浓度有关
B. 活化能是指活化分子的平均能量与反应物分子的平均能量之差
C. 一般情况下,反应的活化能愈高,反应速率愈慢
D. 正逆反应的活化能数值相等,符号相反
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