抗“O”试验阳性说明（）
A.HBV感染
B.链球菌感染
C.大肠埃希菌感染
D.肠道病毒感染
E.沙门杆菌感染
参考答案：B
—What if we don't follow the traffic lights or the traffic police?
—It _______ dangerous. [ ]
A. has
B. could be
C. can have
D. could have
重症肌无力最常合并
A．多发性肌炎B．系统性红斑狼疮C．甲亢D．甲状腺肿瘤E．胸腺肿瘤或胸腺增殖
