【单选题】When firms in an economy start producing more computers and fewer televisions, they are answering the ( ) part of one of the two big economic questions.
【简答题】1)What is known as "Setsubun"? 2)What do many Chinese families burn to bring good luck before the Chinese Lunar New Year? 3 ) What is the old custom in choosing what to wear by brides in America? 4 )W...