题目

The world’s most popular type of banana is facing a major health crisis.  According to a new study, a disease caused by a powerful fungus(真菌) is killing the banana, which accounts for 99% of the banana market around the globe. The disease, called Tropical Race 4 (TR4), has affected banana crops in Southeast Asia for decades. In recent years, it has spread to the Middle East and the African nation. Now experts fear the disease will show up in Latin America, where the majority of the world’s bananas are grown. Once a banana plant is infected with TR4, it cannot get nourishment fr一个正方体纸盒沿棱剪开，可以得到多少种正方体的平面展开图？正方体纸盒最多剪几条棱？最少呢？