Which of the following types of hydraulic pumps would be used in a steering system?() Lobe。 Screw。 Radial piston。 Volute。
电缆障碍的类别大致有() 混线。 断线。 地气。 串音。
法律责任中的惩罚功能就是使违法者、违约人承担法律责任,使其付出代价,教育违法者、违约人和其他社会主体,预防违法行为再次发生。
Which of the following statements is true concerning centrifugal pumps?() They are particularly suited for pumping high viscosity fluids。 They are started with the discharge valve opened。 The flow of liquid is developed by imparting energy due to the rotation of an impeller。 They are always mounted in a horizontal positio。
下列哪些方法可退出Word 2000()。 单击“标题栏”右边的“关闭”按钮。 单击“常用工具栏”右边的“关闭”按钮。 选择“文件”菜单下的“关闭”选项。 选择“文件”菜单下的“退出”选项。
内装饰脚手架,内墙高度在3.6m以内时,按相应脚手架子目()计取。