慢性胃溃疡最常见的并发症是
A.穿孔
B.癌变
C.出血
D.幽门梗阻
E.肠上皮化生
参考答案:C
--I have you asked John to come to the party this evening?
--Yes,I have,but he____
A.doesn't
B.hasn't
C.hadn't
D.won't
古希腊是西方文明的发源地。下列古希腊文明中哪项成果影响最深远? ( )
A.雅典的民主政治
B.《荷马史诗》
C.米罗的维纳斯
D.《几何原本》