I called you, but nobody answered. Where ________ you? [ ]
A. is
B. are
C. was
D. were
答案:D
属于同种异型抗原的物质是()
A.血型抗原
B.IgD
C.灭活的细菌
D.IgG
E.IgM
年轻女性,因甲亢行双侧甲状腺大部切除术,3天后出现声音嘶哑,可能的原因()
A.喉上神经损伤
B.术中切断一侧喉返神经
C.术中误扎一侧喉返神经
D.术后血肿压迫
E.以上都不正确