以下肿瘤标志物中,最常用于胰腺癌辅助诊断的是()。
A.CA199
B.POA
C.CEA
D.PAA
E.PCAA
参考答案:A
He said he didn’t regret telling the truth but felt that he ______ it differently.
A.could have expressed
B.could express
C.must have expressed
D.would express
下列何种药物治疗消化性溃疡,能有效抑制胃酸分泌和促进黏液分泌()
A.西咪替丁
B.阿托品
C.硫糖铝
D.前列腺素E
E.氢氧化铝凝胶