at in this way, the present situation about birds flue doesn’t seem so disappointing.

A．Looking

B．Looked

C．Having looked

D．To look

早期食管癌的描述，错误的是（）。

A.指局限于黏膜和黏膜下层的病变

B.不论病变范围多大，无周围及远处淋巴结转移

C.吞钡检查可见黏膜有中断和破坏

D.吞钡检查可见小的龛影和充盈缺损

E.双对比造影和食管吞钡连续摄影检查可以提高阳性检出率