When a router undergoes the exchange protocol within OSPF, in what order does it pass through each state?（） exstart state>exchange state>loading state>full state。 exstart state>full state>loading state>exchange state。 Loading state>exchange state>full state>exstart state。 exstart state>loading state>exchange state>full state。
财务杠杆系数为1.43表示当息税前利润下降1倍时，普通股每股利润将增加1.43倍。（）
角色期待
男生各项素质指标的高峰出现在（） 11~14岁。 15~18岁。 19~22岁。 23~27岁。
Which two statements about the DiffServ QoS model are true？（） DiffServ requires RSVP to set up a path through the network to accommodate the requested QoS.。 Network traffic is identified by class， and the level of service is chosen for each class.。 The DiffServ model relies on a fairly simple mechanism to provide QoS over a wide range of equipment.。 RSVP enables the DiffServ model to provide end-to-end QoS.。 The DiffServ model is more scalable than the IntServ model.。 The flow-based approach of the DiffServ model is ideal for large scalable implementations such as the public Internet.。
目标营销要经历三个阶段，它们包括市场细分、选择目标市场和（）
