-Did the policeman let you in?

-No, ________ I told him who I was.[ ]

A．if  

B．as if

C．as though  

D．even though

硝酸甘油的不良反应有（）

A.高铁血红蛋白症

B.搏动性头痛

C.体位性低血压

D.眼内压降低

E.大剂量加重心绞痛