外研版八上unit2viennaisthecentreofeuropeanclassicalmusic测试题内容摘要：
lways runs to the telephone to plain about it． ”Background music was started during World War II when some factories had their own orchestras to keep workers happy and calm ． Now， of course, the music is piped in( 以电讯设备传送 ) by a machine and different kinds of music are played at different time in a day． For example， the music they play are faster at 10 than 8， because workers are usually slower then． It39。 s also very interesting that fast music is played in restaurants where hamburger is sold． Before playing fast music， customers spent 22 minutes eating hamburgers. When they started playing fast music， they found that a customer spent only 17 minutes eating! So they have more people ing in and out to buy hamburgers． It39。 s good for business. You can see why music has bee so popular． In Los Angeles(洛杉矶 )， for exampl。阅读剩余 0%
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