饼干有甜咸两种，重量一般在5～15克，食用时以一口一块为宜，适用于酒会、茶点或餐后食用。
参考答案：对
In relation to the United Nations Convention on Contracts for the International Sale of Goods, explain how the following can bring an offer to an end:
(c) rejection. (3 marks)
router-a与router-b之间采用预共享密钥“12345678”建立IPSec关联，请完成下面配置。router-a(config)#cryptike key 1234567 8 address router-a (config)#crypt ike key 12345678 address (5) router-b (config)#crypt ike key 12345678 address (6)
