1.正方体塔例1若干个正方体形状的积木按图1所示摆成塔形:上面正方体中下底的四个顶点,是下面相邻正方体中上底各边的中点,最下面的正方体的棱长为1,平放于桌面上,如果所有正方体能直接看到的表面积超过8.8,则正方体的个数至少是______.(第10届高二2试)解设有n个正方体,此正方体塔能直接看到的表面,包括所有正方体的侧面,以及所有正方体裸露的上底面.由于这n个正方体的棱长,从大 1. Cubes Tower 1 The cubes in the shape of a cube are arranged in a tower shape as shown in Figure 1. The four vertices of the lower base of the upper cube are the midpoints of the upper and lower sides of the lower cube, and the lowermost cube The length of the rib is 1, lay flat on the desktop, if all squares can directly see the surface area exceeds 8.8, the number of cubes is at least ______. (the 10th high 2nd test) solution has n cubes, this The surface that the tower can directly see, including the sides of all cubes, and the exposed upper base of all cubes. Because of the length of the prisms of the n cubes, from the big