单项选择题 There is a certain inevitability that ebook sales have now overtaken paperback sales on Amazon’s US site.Amazon’sKindle 2 is so light and so cheap that it’s easy to see why people have rushed to buy i

单项选择题 关于收入的计量，下列表述中正确的是（）

单项选择题 Early in the age of affluence that followed World War II,an American retailing analyst named Victor Lebow proclaimed,“Our enormously productive economy...demands that we make consumption our way of li