题干
标出所给句子的正确顺序。
A. I am going to Toronto.
B. Are you going to London for your Christmas holiday?
C. By train. You know Toronto isn't far from here. How about you?
D. Yes, I am. Where do you plan to go at Christmas?
E. How are you going there?
F. I am taking a plane. It's really far.
____ ____ ____ ____ ____ ____
答案(点此获取答案解析）
B,D,A,E,C,F
，现在用力将活塞推．使容积减小到
，则汽缸内的压强为 。(填选项前的编号)
