高分化鳞癌中最典型的特征是
A.细胞核分裂少
B.出现角化珠
C.形成癌巢
D.实质和间质分界清楚
E.网状纤维围绕癌巢
参考答案:B
—My sister finished school three years ago.
—What__________these years?
A.did she do
B.has she been doing
C.is she doing
D.does she do
下列哪个人不属于交流说的代表人物?()
A、丘巴梁
B、谢拉
C、周文骏
D、兰开斯特