男,28岁,咳嗽3月余,伴咳痰,胸片如图,最可能的诊断是()
A.肺结核并播散
B.支气管肺炎
C.慢性支气管炎
D.肺慢性纤维化
E.肺癌
参考答案:A
Last night Bruce was observed________the building with two young men and take a taxi away.
A.leave
B.left
C.having left
D.to leave
氮气置换方法是什么?