Why is(71)fun What delights may its practitioner espect 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.Secong is the pleasure of making things that are useful to other people.Third is the fascinanon of fashioning complex puzzle-like objects of interlocking moving parts and watching them work in subtle eyeles,playing out the consequences of principies built in from the beginning.Fourth is the joy of always learning,which springs from the(72)nature of the task.In one way or another the problem is ever new,and its solver learns something:sometimes(73),sometimes theoretical,and sometimes both.Finally,there is the delight of working in such a tractable medium.The(74),like the poet,works only slightly removed from nure thought-stuff.Few media of ereation are so flexible,so easy to polish and rework,so readily capable of realizing grand conceptual structures. Yet the program(
A. semantic
B. practical
C. lexical
D. syntactical
In the early 1800s, groups of English workers wrecked machines that they felt threatened their jobs. (46) They were called "Luddites" after one of their leaders, a term that is now used for anyone who puts up resistance to new technologies. (47) The odd thing about nanotechnology’s Luddites is that they have started resisting before the technology has really established itself.
As people start to buy products involving nanotechnology, from odour-resistant shirts to window glass that repels dirt, they will realise that many of these new things are useful and harmless. And as awareness of nanotechnology grows, they will begin to understand that it covers a range of different ways of doing things, some of which carry some risk and others do not. As a result, the technology’s detractors will probably become more nuanced in their complaints.
Nanotechnology has the potential to cause an industrial upheaval, just as electricity did in its ti
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