Tom made _____ great progress last semester and as _____ result, he was praised by the teacher.

A．a; a

B．a; /

C．/; /

D．/; a

下列肺吸虫病的描述，错误的是（）

A.单房或多房囊状透光区

B.圆形或片状模糊影

C.大小不等硬结影，可钙化

D.结节状、片状阴影

E.肺门淋巴结肿大