_____ you walk outside alone when you were a child?[ ]
A. Do
B. were
C. Did
答案:C
有关原发性肝癌,下列错误的是()。
A.绝大多数是肝细胞癌
B.肝细胞癌多在肝硬化的基础之上发生
C.原发性肝癌主要通过淋巴转移
D.肝细胞癌多见于男性
E.混合型癌最少见
含油率