Regulations on the levy of import duties on incoming passenger's luggage and articles shall be formulated by ______.

A．the Customs General Administration

B．the Tariff Commission

C．the State Council

D．the Economic Planning Commission

维生素D缺乏性佝偻病的主要病因是（）

A.日光照射不足

B.肝肾疾病

C.过敏性肠炎

D.双胎

E.腹泻