十二指肠溃疡的并发症是
A.出血
B.穿孔
C.梗阻
D.癌变
参考答案:A,B,C
People always interrupted his before he________what he was trying to day.
A.finishes
B.would finish
C.had finished
D.has finished
下列是一些引起人患寄生虫病的病原体,其中消化道有口有肛门的是( )
A.肝片吸虫
B.华支睾吸虫
C.蛔虫
D.猪带绦虫