My father will come back ______ a month. [ ]
A. after
B. at
C. by
D. in
答案:D
女,45岁,黄疸,食欲不振,体重减轻已3个月,皮肤黄染,肝大,胆囊可触及,外院血检,TB180μmol/L,AKP(碱性磷酸酶)45U(金氏单位),ALT(SGPT)26U。
该病人在门诊首选检查为()
A.B超
B.CT
C.DSA
D.核素扫描
E.血CEA
若D1=a1,a2,a3,D2=(b1,b2,b3,则D1×D2集合中共有元组( )个。
A.6 B.8C.9 D.12