shoes must be worn when one goes into a chemical/bio-chemical lab. She has been in the USA so should know this clearly.
The whole thing for her paper is too unprofessional.
Sure. For safety issue, the lab coat, protection goggle and safe
所有跟帖:
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哈哈哈,她不会是实验器具没弄干净做出来的吧?
-王翠花-
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03/10/2014 postreply
21:35:10