关于感染所致的支气管扩张病理改变,错误的是()
A.支气管上皮脱落
B.管壁平滑肌减少或缺如
C.支气管壁内炎细胞浸润
D.管壁肿胀
E.管壁周围有纤维组织增生
参考答案:B
—Can you stay here longer?
— _______. But I have to be back tomorrow. [ ]
A. I'd love to
B. I'm afraid not
C. I'm sorry, I can't
D. No, thank you
怎样才能配制出高质量的石硫合剂?