According to the Customs Law, the duty-paying value of an import item should be its normal ( ) price which should be approved by Customs.

A．FOB

B．CIF

C．CFR

D．FCA

肝豆状核变性的特点有（）

A.属免疫性疾病

B.常染色体显性遗传

C.铜代谢障碍

D.特征性眼部表现为角膜色素环

E.多见于老人