肺肉质变指
A．肺泡壁纤维化
B．支气管壁纤维化
C．胸膜渗出物机化
D．肺泡腔内渗出物机化
参考答案：D
E-mail, as well as the telephone, ___________ an important part in daily communication.
A．is playing
B．have played
C．are playing
D．play
为什么说脑垂体是鱼体最重要的内分泌器官？
