[问答题,简答题] 呕吐

牙痛 扭伤 与判断化合物纯度有关的是（） ["熔点测定","选择3种以上的色谱条件检测","观察晶形","测定比旋光度","闻气味"] 使生物碱碱性减小的吸电子基团有（） ["羰基","醚基","烷基","酯基","苯基"] 中风 呕吐