[简答题]E-commerce is coming of age, but not in the way predicted in the bubble years. (71.) Now some of the dotcoms are making real profits, but the business world has become much more cautious about the internet’s potential. The funny thing is that the wild predictions made at the height of the boom—namely, that vast chunks of the world economy would move into cyberspace—are, in one way or another, coming true. 　　(72.) According to America’s Department of Commerce, online retail sales last year rose by 26%, to $55 billion. That sounds a lot of money, but it amounts to only 1.6% of total retail sales. (73.) The vast majority of people still buy most things in the good old “bricks-and-mortar” world. 　　(74.) But the commerce department’s figures deal with only part of the retail industry. (75.) For instance，they exclude online travel services, one of the most successful and fastest-growing sectors of e-commerce. InterActiveCorp (IAC), the owner of expe