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简述旋回破碎机检修后空载和负载试车要求。

答案

参考答案：

破碎机空载试车，连续运转不得少于2～4小时，必须达到如下要求：

一、破碎园锥摆动平稳，无显著振动。

二、园锥齿轮不得有周期性的噪音。

三、润滑系统应达到如下要求：给油管的压力应在0.8-1.5kg/cm2范围内，回油温度不得超过50℃。

四、无载试车后，检查各主要部件的摩擦部分不得有磨损现象。

破碎机负载试车不能少于12—24小时，必须达到下列要求：

一、破碎园锥的转动要平稳，无显著振动。

二、破碎机给矿、排矿正常，产品粒度均匀。

多项选择题

根据《中华人民共和国合同法》，下列合同中，属于可变更、可撤销合同的有（）。

A.限制行为能力人订立的合同

B.因无权代理而订立的合同

C.因重大误解而订立的合同

D.订立时显失公平的合同

E.无权处分他人财产而订立的合同
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单项选择题

Why is (111) fun What delights may its practitiopect as his reward First is the sheer joy of making things. As the child delights in his mud pie, so the adult enjoys building things, especially things of his own design. Second is the pleasure of making things that are useful to other people. Third is the fascination of fashioning complex puzzle-like objects of interlocking moving parts and watching them work in subtle cycles, playing out the consequences of principles built in from the beginning. Fourth is the joy of always learning, which springs from the (112) nature of the task. In one way or another the problem is ever new, and its solver learns something: sometimes (113) , sometimes theoretical, and sometimes both. Finally, there is the delight of working in such a tractable medium. The (114) , like the poet, works only slightly removed from pure thought-stuff. Few media of creation are so flexible, so easy to polish and rework, so readily capable of realizing grand conceptual structures.
Yet the program (115) , unlike the poet’s words, is real in the sense that it moves and works, producing visible outputs separate from the construct itself. It prints results, draws pictures, produces sounds, moves arms. Programming then is fun because it gratifies creative longings built deep within us and delights sensibilities we have in common with all men.

A．programming

B．composing

C．working

D．writing
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