一、实验要点剖析1.药品的取用(1)取用原则①三不原则:不用手摸药品、不凑近闻药品的气味,不尝药品的味道;②节约原则:要严格按实验规定的用量取药品;如果没有说明用量时,应按最少量取用:液体1~2 mL,固体只需盖满试管底部;③处理原则:实验用剩的药品应放入指定容器内,既不能放回原瓶,也不能随意丢弃. First, the analysis of experimental points 1. Access to medicines (1) access to the principle of ① three non-principle: do not touch the drugs, do not pick up smell the smell of drugs, do not taste the taste of drugs; ② savings principles: Dosage to take drugs; if not specified dosage, should be taken at least the amount of: liquid 1 ~ 2 mL, the solid just covered the bottom of the tube; ③ treatment principles: the remaining drugs used in the experiment should be placed in the designated container, Back to the original bottle, can not be discarded.