下列哪些化合物是吗啡氧化的产物() ["A蒂巴因","B双吗啡","C阿朴吗啡","D左吗喃","EN-氧化吗啡"]
发电机失磁的电气特征有那些?
下列哪一类药物不属于合成镇痛药() ["A哌啶类","B黄嘌呤类","C氨基酮类","D吗啡烃类","E芳基乙酸类"]
属于哌替啶的鉴别方法() ["A重氮化偶合反应","B三氯化铁反应","C与苦味酸反应","D茚三酮反应","E与甲醛硫酸反应"]
地西泮水解后的产物有() ["A2-苯甲酰基=4-氯苯胺","B甘氨酸","C氨","D2-甲氨基-5-氯二苯甲酮","E乙醛酸"]
变压器的瓦斯保护,在运行中应注意哪些问题?