______ what they're talking about. [ ]
A. They're
B. This's
C. There's
D. That's
答案:D
女患者,25岁,不明原因发热二月入院,贫血貌,杵状指,皮肤黏膜有多处小出血点,入院时,三尖瓣区有Ⅲ级吹风样杂音,近日消失,脾大,有压痛,血液培养为草绿色链球菌,拟用青霉素G和下列之一药合用,宜选用()
A.链霉素
B.阿米卡星
C.奈替米星
D.红霉素
E.羧苄西林