题目内容
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
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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
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 ____________.
Newcomers who fail to blend in with the local community sometimes develop a critical attitude towards the local people. Such an attitude can be considered as their defence _________because they feel insecure in the new environment.
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