第13题: [单项选择]现有IP地址160.60.0.60,那么它一定属于( ) 类地址。 A. A B. B C. C D. D 参考答案:B 答案解析:[解析] 32位二进制数的B类地址以10开头,第一字节的范围为128(二进制为 10000000) 到191(10111111)。所以,160.60.0.60属于B类IP地址。
第29题: [单项选择]Who found the lost boy A. Tom. B. Tom’s youngest brother. C. A policeman. 参考答案:C 答案解析:[听力原文] W: Have you found your youngest brother, Tom M: Yes. He was picked up by a policeman.
第30题:[单选题] 西一线站场PLC系统中SD32X主要用于: A.220Vac电源防浪涌保护 B.24Vdc电源防浪涌保护 C.信号防浪涌保护 D. 高压保护 参考答案:C
第32题: [单项选择]{{B}}Questions 11 to 18 are based on the conversation you have just heard.{{/B}} A. $4.25. B. $4.75. C. $17.00. D. $8.50. 参考答案:D 答案解析:[听力原文]
W: We went to the new restaurant at the corner last Saturday and had two fish dinners for th