【单选题】滴定分析中应当选择甲基橙,但选成了酚酞,所造成的误差属于()
【简答题】The pattern of rhythm in an English poem is called " (1) ".
【判断题】Keating's way of appreciating an English poem is not to care about what the author thinks, but how the readers feel when they read the poem.
【单选题】下列关于喹诺酮类药物的说法不正确的是( )。