【单选题】I could see from his work that he had made a ______ study of his subject. Otherwise, he couldn't have made such a rapid progress.
【单选题】由设计单位或建设单位提出的技术修改或工程变更,采用( )
【判断题】如果苹果和橙子是替代品,苹果价格上升使得橙子的需求减少。
【判断题】建筑群配线架CD到建筑物配线架BD间的距离不应超过两千米。
【单选题】患者,女性,34岁,胸外伤后致开放性气胸。下列最有诊断价值的体征是
【单选题】对于开放性气胸患者,最有诊断价值的体征是