下列喉部疾病中，最易引起喉阻塞的是（）
A.喉水肿
B.喉角化症
C.喉白斑病
D.喉淀粉样变
E.喉气囊肿
参考答案：A
George. W. Bush, _______ President of the United States, is to visit China _______ third time.
A．a；a
B．the；a
C．/；a
D．/；the
Thanks __________ the photo of your family．
A．to B．in C．for
