题目

------I need some fresh air, so I am going out for a walk.  -------__________________ Have fun!       B.With pleasure!     C.You had better not!   D.It is none of my business! 答案：A 解析: 略一个正方体纸盒内装一个最大的圆柱，下面说法不正确的是（　）。A.圆柱的体积等于正方体的体积。B.圆柱的底面直径等于正方体的棱长。C.正方体的棱长等于圆柱的高。D.圆柱的表面积小于正方体的表面积。