综合填空
Museums have changeD． They are no longer places that one “should”go but to e_____．At as______ museum  in Canada, you can feel your hair stand on end as harmless electricity passes through your body．At the Children’s Museum in New York,you can play an African drum．There are no “Do Not Touch” s_____in some other museums in the USA.
More and more museum directors have realized that people learn beat when they can become part of what they are seeing．In many science museums, the visitors are encouraged to t_____, listen,operate and experiment so as to discover scientific rules for themselves.
The p____ is not only to provide fun, but also help people feel at home in the world of science．If people don’t understand science, they will be afraid of it; and if they are afraid of science, they will not make the best use of it．One cause of all these c____ is the increase in wealth and spare time． A_____ cause is the growing number of young people．Many of them are college students or college graduates．They see things in a new and different w_____．The old museums have been changing and the government is e_____ the building of new, modern museums．In the States and Canada, there are more than 6 000 museums, almost twice as m____ as there were 25 years ago