鸡大肠杆菌病的临床表现形式是（）
A.败血型
B.气囊炎
C.肝周炎
D.滑膜炎
E.以上都是
参考答案：E
— Shall I go and buy two more bottles of beer?
— No, I’ve already bought twenty. That _____ be enough for us two.
A．can
B．may
C．ought to
D．might
简述智能卡和电子钱包的特点？
