题干
---- I’d like to buy a ticket to Tokyo. Are there any tickets left?
---- _______. I’ll check it for you right now.
---- _______. I’ll check it for you right now.
A：Could you wait a minute, please?
B：I don’t know
C：All right.
D：I’m sorry there is none left.
答案(点此获取答案解析）
A
的图像在点
处的切线为
，则
轴与直线
围成的三角形的面积等于