改善急性左心衰竭症状最有效的药物是
A．利尿剂B．洋地黄制剂C．钙离子拮抗剂D．β-肾上腺素能受体阻滞剂E．血管紧张素转换酶抑制剂
参考答案：A
—That must be Mr. John.
—No, it ______ be him. I saw him off at the airport half an hour ago.[ ]
A. may not
B. mustn't
C. can't
D. needn't
子淋阴虚津亏证应选（）
A.加味五苓散
B.杞菊地黄丸
C.知柏地黄丸
D.导赤散
E.止嗽散
