第19题: [单项选择]Questions 19 to 21 are based on the conversation you have just heard. A. He uses it for his job. B. He spends too much time on the bus. C. He lives too far from the university. D. He would feel safer at night with a car. 参考答案:D 答案解析:[听力原文]19-21 M: Hi, Mary. W: Hi, Thomas. What’s happening M: Well, I’ve decided I have to g
标高基准点一般埋设在基础边缘且便于观测的位置,其中( )主要用于连续生产线上的设备在生产安装时使用。 A. 简单标高基准点 B. 钢制标高基准点 C. 复杂标高基准点 D. 预埋标高基准点 参考答案:D 答案解析:标高基准点一般埋设在基础边缘且便于观测的位置。其中预埋标高基准点主要用于连续生产线上的设备在生产安装时使用。故选D。