下列关于大肠杆菌的描述不正确的是（）
A.革兰染色阴性
B.不能引起肺炎
C.兼性厌氧
D.无荚膜
E.营养要求低
参考答案：B
Though smoking is not allowed in the public places, many people are still in _______ habit of smoking in the train or bus in _______ public.
A．the；the
B．/；/
C．the；a
D．the；/
