A. Update B. Keepalive C. Open D. 通告 参考答案:C 答案解析:[解析] 边界网关协议(BGP)的报文通过TCP连接传送。BGP有4种报文。 ·Open报文:用于建立邻居关系。 ·Update报文:用于发送新的路由信息。 ·Keepa
第8题: [单项选择]肾结核患者最早出现的症状是 A. 尿频 B. 血尿 C. 脓尿 D. 肾区疼痛 E. 午后低热、盗汗 参考答案:A
第9题: [单项选择]Questions 9 to 12 are based on the conversation you have just heard. A. The woman’s musical background. B. The woman’s economic situation. C. The woman’s dislike of chemistry. D. The woman’s decision to take on so much work. 参考答案:D 答案解析:[解析] Q: What does Dr. Tyler seem most concerned about