下述哪些动脉属于颈内动脉系统()
A.大脑前动脉
B.小脑后下动脉
C.大脑后动脉
D.大脑中动脉
E.基底动脉
参考答案:A, D
I have to go now because I must be ____ for class, otherwise, the teacher would scold me. [ ]
A. punctual
B. active
C. sensitive
D. optimistic
甲胎蛋白(AFP)升高的临床意义是()
A.AFP>400μg/L时可确诊肝细胞癌
B.肝转移癌患者AFP常显著增高
C.手术后AFP又升高提示肝癌复发
D.消化道其他肿瘤AFP不会升高
E.ALT和AFP同时增高更支持肝癌诊断