第26题: [单项选择]Why was Roger sad to hear what the old man said' Because he was afraid nobody ______. A. would talk about football with him B. liked to cut his hair C. could cut his hair as he wanted it D. would become his friend 参考答案:C 答案解析:由短文第三自然段可知,Roger恐怕别人不能像老理发师那样剪出他想要的发型。
第27题: [单项选择]发送方的加密数据在到达最终节点之间不被解密的是 A. 链路加密方式 B. 节点到节点方式 C. 节点到端方式 D. 端到端方式 参考答案:D 答案解析:[命题目的] 考查网络传输中的加密技术。 [解题要点] 端到端加密方式,加密解密只在源宿结点进行。 [错解分析] A)中,在中间结点必须解密;B)中在保护装置内解密。 [考点链接]
第30题: [单项选择]关于弯曲菌病,下列哪项错误() A. 空肠弯曲菌和结肠弯曲菌主要引起急性肠炎 B. 弯曲菌病主要致病菌有空肠弯曲菌、结肠弯曲菌和胎儿弯曲菌 C. 结肠弯曲菌可引起败血症 D. 胎儿弯曲菌多为机会性感染,可引起败血症等全身性感染 E. 弯曲菌感染主要引起腹泻、肠道外器官的局灶感染和菌血症 参考答案:C