(8分)请指出下列操作可能造成的不良后果 (1)胶头滴管取用试剂后,将其倒置_____________________________________________ (2)倾倒液体药品时,试剂瓶标签朝下_____________________________________________ (3)加热固体时,试管口没有略向下倾斜____________________________________________ (4)蒸发溶剂时,未用玻璃棒搅拌__________________________________________________ |