___________________, but he still couldn’t understand what I meant.

A． Having been told many times

B．Having told many times

C． He had been told many times.

D．Although he had been told many times.

两肺野透明度减低，如磨砂玻璃样，肺门阴影大而模糊，两肺门上出现向上的鹿角状血管影，应首先考虑为（）

A.肺充血

B.肺淤血

C.肺气肿

D.肺缺血

E.肺水肿