感染流感嗜血杆菌的婴幼儿肺炎患者，其并发症通常是（）
A.肾衰竭
B.脑膜炎
C.腹泻
D.肝昏迷
E.肺脓疡
参考答案：B
Have you ever ______ the Great wall? [ ]
A. been to
B. gone to
C. go to
D. been
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