异丙肾上腺素易氧化变色,原因是其结构中含有以下哪个不稳定的结构
A.儿茶酚结构
B.侧链上的羟基
C.侧链上的氨基
D.苯乙胺结构
E.烃氨基侧链
参考答案:A
Any dispute arising from duty payment between the auditee and the Customs should be dealt with in accordance with the provision laid down in the
A.regulations on Customs External Auditing of the peopli's Republic of China
B.customs law of the People~ Republic of China
C.regulations on Import and Export Tariff of the People~Republic of China
D.Both B and C
下列持“环境决定论”观点的人物是()。
A.柏拉图和霍尔
B.柏拉图和华生
C.霍尔和洛克
D.洛克和华生