女,55岁,胸痛伴咯血丝痰一周,胸部CT如图,最可能的诊断为()
A.转移性肺癌
B.左侧周围型肺癌并肺内转移
C.左侧中央型肺癌并肺内转移
D.多发性肺脓肿
E.结节病
参考答案:B
He spent as much time as he could ______ his spoken English. [ ]
A. improve
B. improving
C. to improve
D. improved
固化剂三乙胺的沸点为()℃。
A.82
B.86.7
C.92.3
D.95