You said to me, "I saw the film two days ago."

You told me that you had seen the film __ [ ]

A. two days          

B. two days before

C. two days ago        

D. yesterday

注射剂配制中使用活性炭时，错误的方法是

A．活性炭应在150℃活化2～3小时

B．选用针剂用活性炭

C．药液中加入活性炭后，应煮沸搅拌15分钟

D．用量越多除去杂质越多

E．活性炭对药物有效成分有吸附性