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彭于晏崔始源广州 合体 兄弟情深 电影 破风 首日票房火爆 燃起来.
Unit 1 - Lab Safety Notes. Know what safety equipment is in the room and where it is located. Never eat, chew gum, or have drinks in the lab. No Horseplay in the lab. Report all accidents, spills and cuts to the teacher immediately. Use equipment only as directed. Do not perform your own experiments. Return equipment where it should go and clean it if instructed. Keep work area clean and uncluttered. Dress properly for the lab.
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