TobicYAL

摘要： 描述 Suppose that the fourth generation mobile phone base stations in the Tampere area operate as follows. The area is divided into squares. The squares 阅读全文

摘要： 描述 There is an apple tree outside of kaka's house. Every autumn, a lot of apples will grow in the tree. Kaka likes apple very much, so he has been car 阅读全文