女性,56岁。反复咳嗽、咳大量脓性痰、伴杵状指2年,最可能的疾病是()
A.二尖瓣狭窄
B.支气管肺癌
C.支气管扩张
D.慢性支气管炎
E.铜绿假单胞菌肺炎
参考答案:C
China's grain production has been on _______ rise in the past eight years, with _______ annual increase of 17.5 billion kg. [ ]
A. the; an
B. a; an
C. the; the
D. a; the
简介立式真空粉末绝热低温液体贮槽的结构?(如液氩贮槽)