第13题: [单项选择]Questions 11 to 18 are based on the conversation you have just heard. A. She hasn’t called the travel agency yet. B. The man may have to reschedule his trip. C. She doesn’t know when her semester ends. D. The man should take his vacation somewhere else. 参考答案:B 答案解析:[听力原文] M: I just called the travel agency, it’s all set. On June first, I’m heading for the mount
第14题: [多项选择]设计未作规定进行强度试验或工作压力小于( )MPa的煤气管道,或工作压力小于 ( )MPa的天然气管道,可直接进行严密性试验。 A. 0.1,0.4 B. 0.1,0.2 C. 03,0.6 D. 0.4,0.6 参考答案:A 答案解析:设计未作规定进行强度试验或工作压力小于0.1MPa的煤气管道,或工作压力小于0.4MPa的天然气管道,可直接进行严密性试验。