诊断肺癌最可靠手段是（）
A.病史、体征
B.胸部X线检查
C.胸部体层摄片
D.放射性核素肺扫描
E.痰细胞学或纤维支气管镜检查
参考答案：E
There is ________ food here . We don' t need to buy any.
A．too many
B．too much
C．very many
D．much too.
The clock has just _________ twelve. All the teachers should stop _________ and let the students have a rest.
A．hit; to teach
B．beaten; teaching
C．struck; teaching
D．knocked; to teach
