实验室中因大意或缺乏应有的知识而造成事故的事例已屡见不鲜，因此必须分外小心。每次实验前，应该仔细检查仪器设备，对可能发生的事故有充分的估计和准备。为此，必须掌握以下知识： １、防火 电及煤气、乙醇等有机溶剂造成的火灾较为常见。在充满易燃蒸气的室内可因电闸、 It is not uncommon for laboratories to cause accidents due to lack of knowledge or due knowledge, so care must be taken. Before each experiment, the equipment should be carefully inspected, and the possible accidents can be fully estimated and prepared. To this end, we must have the following knowledge: 1, fire and electricity, gas, ethanol and other organic solvents caused by the fire is more common. In the room full of flammable vapor may be due to electric gates,