判断题

制造单位应当按规定建立应急设施，配备应急装备，储备应急物资，并进行经常性的检查、维护、保养，确保其完好、可靠。

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Why is（）fun What delights may its practitioner expect 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（）nature of the task.In one way or another the problem is ever new,and its solver learns something:sometimes（请作答此空）,sometimes theoretical,and sometimes both.Finally,there is the delight of working in such a tractable medium.The（）,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（）,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.semantic]
B.practical
C.lexical
D.syntactical

判断题

对重压足在缓冲器上，曳引机按电梯上行方向旋转时，不可能提升轿厢。

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