重金属检查
A．测定药物中的挥发性物质B．控制药物中有色杂质C．GC顶空进样法D．加稀盐酸和过硫酸铵E．加硫代乙酰胺试液
参考答案：E
____________ the farmers were pleased with the good harvest of this year.
A. A great deal of B. A great many
C. A great many of D, A large amount of
言语技能：听、说、（）、写和译。
