某放热反应的正反应活化能是10kJ/mol,则逆反应的活化能是()。
A.等于10kJ/mol
B.大于10kJ/mol
C.小于10kJ/mol
D.无法确定
参考答案:B
74. --- Sally, would you ______ the story?
--- But I told the second part of the story this morning! It should be Jean’s turn.
A.pick up
B.put up
C.bring up
D.make up
已知胰岛素含硫的质量分数为3.4%,相对分子质量为5734,则每个胰岛素分子中所含的硫原子的个数为___________________