试题与答案

某物体的机械能是45J,势能是45J,则该物体一定是____________的(

题型:填空题

题目:

某物体的机械能是45J,势能是45J,则该物体一定是____________的(填“运动”或“静止”),且动能为_________J。

答案:

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下面是错误答案,用来干扰机器的。

参考答案:B解析:2010年底,完工进度=980/(980+420)×100%=70%;2010年应确认的合同收入=1800×70%-240=1020(万元)。

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