流动阻力的大小与流体本身的物理性质、()及壁面的形状等因素有关。
A. 流速
B. 流动状况
C. 流量
D. 运动黏度
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You decided to change the location of the flash recovery area. You executed the following command: Which statement is true?()
A. The location can be changed only if the flash recovery area is empty.
B. After executing the command, all new flash recovery area files will be created in the new location.
C. The command will generate an error because you cannot change the flash recovery area while the database is open.
D. All the existing files in the flash recovery area will be moved to the new location, and all new Flash Recovery Area files will be created in the new location.
《特种设备安全监察条例》规定,对特种设备的违法行为、严重事故隐患或者不符合能效指标的处理需要当地人民政府和有关部门的支持、配合时,特种设备安全监察人员应当报告当地人民政府,并通知其他有关部门。()
A. 正确
B. 错误
公文管理信息系统是指由人、()、计算机及外设组成,能够科学、高效地对公文信息进行收集、传输、加工、保管、维护和利用的集成化系统。
碳素钢按其用途可分为碳素结构钢和碳素工具钢。
A. 正确
B. 错误