使用移液管转移溶液时,待溶液自然流出后需停靠15s,再移开
A. 对
B. 错
使用电子分析天平称量样品时,若一次取多了,可将多余的样品放回至原试剂瓶
A. 对
B. 错
To make their new dormitory_________, the girls spent three days cleaning and decorating it before they moved in.
When your hand touches something extremely hot, you pull it back immediately as a ____________.