下列征象中,哪一项对周围型肺癌的诊断价值最大()
A.分叶和毛刺
B.空洞
C.钙化
D.肺门或纵隔淋巴结肿大
E.无卫星病灶
参考答案:A
He ____early the next morning, finding the brook______one foot.
A.rasied; rasied
B.rose; had rasied
C.had risen; risen
D.rose; had risen
交流接触器铜触点因表面氧化,积垢造成()时,可用小刀或()清除表面,但应保持触点原来的()。