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According to this passage, we learned that ______ [

A、 ] background music can have a powerful effect on some people.

B、 ] background music spread to the world by Dr. Milliman. [

C、 ] Dr. Milliman found fast music meant customers took longer to eat. [

D、 ] Dr. Milliman made background music. [

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出自：阿坝师范学院大学英语

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