判断题As manufacturing techniques allow components to shrink in size, hardware engineers find it easier to work.

判断题Under FOB and CFR

判断题A general purpose computer doesnt contain any built-in programs.

判断题In 1998 consumers could purchase virtually anything over the Internet. Books, compact discs, and even stocks were available from World Wide Web sites that seemed to spring up almost daily. A few years earlier, some people had predicted that consumers accustomed to shopping in stores would be reluctant to buy things that they could not see or touch in person. For a growing number of time-starved consumers, however, shopping from their home computer was proved to be a convenient alternative to driving to the store. A research estimated that in 1998 US consumers would purchase $7.3 billion of goods over the Internet, double the 1997 total. Finding a bargain was getting easier owing to the rise of online auctions and Web sites that did comparison shopping on the Internet for the best deal. For all the consumer interest, retailing in cyberspace was still a largely unprofitable business, however. Internet pioneer Amazon. com, which began selling books in 1995 and later branched into recorded music and videos, posted revenue of $153.7 million in the third quarter, up from $37.9 million in the same period of 1997. Overall, however, the company's loss widened to $45.2 million from $9.6 million, and analysis did not expect the company to turn a profit until 2001. Despite the great loss, Amazon. com had a stock market value of many billions, reflecting investors' optimism about the future of the industry. Internet retailing appealed to investors because it provided an efficient means for reaching millions of consumers without having the cost of operating conventional stores with their armies of salespeople. Selling online carried its own risks, however. With so many companies competing for consumers' attention, price competition was intense and profit margins thin or nonexistent. One video retailer sold the hit movie Titanic for $9.99, undercutting (削价) the $19.99 suggested retail price and losing about $6 on each copy sold. With Internet retailing still in its initial stage, companies seemed willing to absorb such losses in an attempt to establish a dominant market position.

判断题The author believes that to shut the computer down means its not using energy.

判断题One of the reasons for building a distributed system is that some applications are inherently distributed.

判断题Programs cant be built into the hardware itself.

判断题HMDs were first demonstrated in 1980.

判断题Computable numbers may or may not be computed by a Turing machine.

判断题Lookahead techniques were introduced to prefetch instructions.

判断题Dishonor only refers to the refusal to make payment by the payer when it is presented for payment.

判断题IBM Vatican Library Project is a very valuable service because it takes a long time to make it.

判断题Many educators feel sure that distant students learn as much as students having traditional face-to-face instruction.

判断题The use of VR in navigation can reduce the risk of human lives.

判断题Usually software is classified depending on the kinds of work done by a computer.

判断题Acceptance should be declared only by written form.

判断题Virtual-reality devices not only transmit sounds to the user, but also record and send his speech to the program.

判断题In movies on demand

判断题The Trojan is a virus that keeps shutting down your computer.