A：实验时剩余的药品不能放回原瓶
B：过滤时滤液不能超过滤纸边缘
C：制取和收集气体时先对装置进行气密性检查
D：可燃性气体点燃前一定要检验纯度
—Oh. Mary's not here these days. Is she ill? —_____.Her mother told me that she was in hospital.
一Angelababy gave birth to a baby in January. Who will replace her in the reality show Keep Running?
一 Dilraba. She is famous for acting in Diamond Lover （《克拉恋人》).
