男，41岁，发现右上颈包块2个月，病理活检为低分化鳞癌，原发灶最常位于（）
A.上颌窦
B.鼻咽部
C.下咽部
D.扁桃体
E.喉
参考答案：B
The Expo 2010 Shanghai has not only proved to be a great success but also provided a fantastic model for Milan ________ managing and organizing events of this scale.[ ]
A．in need of
B．in terms of
C．in search of
D．in favour of
验收调查工作可分为( )阶段。
A．四个B．五个C．三个D．六个
