1937年焦土抗战，即在城市无法守住之时，将其重要设施烧掉，以免资敌，发生在哪？
参考答案：发生在长沙
I first met Lisa three years ago. She ________ at a radio shop at the time.[ ]
A. was working
B. has worked
C. had worked
D. had been working
下列检查中，可确诊支气管异物的是（）。
A.X线片检查
B.支气管镜检
C.磁共振检查
D.病检
E.CT检查
