单项选择题
对于转移2个电子的氧化还原反应,已知其pE0=13.5,则其平衡常数㏒K=
单项选择题 问题强度指的是()
单项选择题 There are still some ( ) for students of science and engineering, but those in arts and humanities have been filled.
单项选择题 以下关于保证金的描述中错误的是()