Who's your mother's father?[ ]
A. Grandmother.
B. Grandfather.
C. Mother.
答案：B
乳癖是指下列哪种疾病（）
A.急性乳腺炎
B.乳腺纤维腺瘤
C.乳晕部瘘管
D. * * 结核
E. * * 异常发育症
