The Customs shall reply in writing within ( ) from the date of receipt of the application for the refund of the duty paid and notify the applicant of its decision.

A．one month

B．two months

C．three months

D．six months

甲硝唑用于治疗成人阿米巴痢疾时，常用利量每次为

A．800mg

B．700 mg

C．600mg

D．500mg

E．400rug