肿块首发于颈下1／3区的转移癌，原发病灶可能来自
A．鼻腔、鼻窦
B．甲状腺
C．胸腔
D．腹腔
E．鼻咽
参考答案：B, C, D
下列哪项不属于财务型的风险转移方式？（）
A.损失抑制
B.保险
C.套期保值
D.分散投资
The old man enjoys ______ stamps. And now he has 1325 of them. [ ]
A. collect
B. collected
C. collecting
D. to collect
