单项选择题根据CSMA CD协议的截断二进制指数类型退避算法，站点在发生四次碰撞后，会在1~16之间选择一个随机数。（ ）
单项选择题According to theUnited Nations Convention on Contracts for the International Sale of Goods (CISG), if an offer is made in writing, the acceptance must also be in writing. A、正确 B、错误
