【单选题】【6】某材料原价为300元/t,运杂费及运输损耗费合计为50元/t,采购及保管费费率为3%,则该材料预算单价为()元/t。
【简答题】图示机构中,若已知各个齿轮的 齿数,试列出其传动比的计算式,并说明那个齿轮是过轮。
【简答题】Match the words with their meanings. defender handball offside referee shooter striker touchdown (a) a football player whose main job is to score goal_____ (b) a pl...
【简答题】Match the words with their meanings. defender handball offside referee shooter striker touchdown (a) a football player whose main job is to score goals (b) a player who ...
【判断题】盘式制动器的自动回位,多数是通过活塞后部的油封来实现的。()
【判断题】盘式制动器的自动回位,多数是通过活塞后部的油封来实现的。