Lions ________ from Africa. [ ]
A. are also
B. also too
C. also are
D. too also
答案:A
消化性溃疡最常见的并发症为()
A.穿孔
B.出血
C.幽门梗阻
D.癌变
E.瘘管形成
医德评价的客观标准包括:()
A.疗效标准
B.社会标准
C.科学标准
D.动机标准