题目内容：

what can you do and what can not you do in your school lab

优质解答

no smoking.不许吸烟.
no photoes.不许拍照.
don't speak aloud.不许大声喧哗.
don't touch the valuables.禁止触摸贵重物品
handle with care.小心轻放.
wear a lab coat.请穿实验装.