【单选题】We believe _______ you have been devoted to ________ naturally of great necessity.
【单选题】液压传动是以液体为工作介质,利用液体的( )来实现能量传递和转换的。
【单选题】All the colour TV sets ____ out before we arrived . [ ]
【单选题】——Why not stop for a break now? —— _____ .We have been busy working all day and all of us are tired.
【判断题】液压传动是以液体为工作介质,利用液体的压力能来转换、传递、控制运动及动力的传动,
【单选题】Most people interviewed said: “We have been warned all about the effects of sunbathing, yet we keep putting ourselves ___ .”
【判断题】风险越大,风险附加费就越大,风险附加费太高对合同双方均不利,一方面业主必须支付较高的合同价格,另一方面承包方的报价太高也会失去竞争力,导致其难以中标。
【单选题】以液体为工作介质,利用液体的压力能来转换、传递、控制运动及动力的一种传动方式是:
【单选题】- Where have you been all day? - We _________ some beautiful children and we couldn’t get away from them until it was dark.