题干
— Hi, Ken. Did Mrs. Zhang tell us ________?
—Yes. She said we should meet there at nine.
A：which was the way to the station
B：why we should meet at the station
C：when we should get to the station
D：who we should meet at the station
答案(点此获取答案解析）
C
和
时，紧急刹车时的刹车痕与刹车前车速的关系曲线，则
是
，则①应为