下列哪种疾病不能在胸片上看到"空气支气管征"（）
A.细支气管肺泡癌
B.大叶性肺炎
C.阻塞性肺炎
D.肺泡性肺水肿
E.肺出血
参考答案：C
In the author’s opinion, teachers can only be promoted depending on ______.()
A. how well they give their lectures
B. how well they get along with the students
C. how many papers and books they have published
D. how well they conduct their academic researches
什么叫中性油？
