快速以太网数据传输速率为（）。 ["10Mb\/s","100Mb\/s","1000Mb\/s","100MB\/"]
支（拱）架设置千斤顶、木楔、木马、砂筒或其他便于松动支撑构件的支垫，应符合哪些要求？
电化教学训练包括两个基本要素：一是电教工具、二是电教工具在教学训练中的运用。
模板滑升分为哪几个阶段？
A special device that，when fitted into the rotary table，transmits torque to the kelly and simultaneously permits vertical movement of the kelly to make the hole is called a（）. ["master bushing","kelly slips","kelly bushing","rotary bushing"]
滑模初升有何要求？
