PCR products were then analysed _____ electrophoresis _____ 2% agarose gel.

A . above the explosive range B . within the explosive range C . below the explosive range D . None of the above

Man: Well, I was thirty and settled at work, but then I came across a report predicting annual internet growth at 2,300%. The figure was like an alarm clock ringing in my head. I started to think about the regrets I might have at eighty. I realised I probably wouldn't even remember the things that seemed important in my thirties (like getting my end-of-year pay bonus. But I'd definitely tell myself I'd been a fool to ignore the internet. Woman: How did you go about choosing a product？ Man: Well, I drew up a list of twenty products, from clothes to gardening tools, and from that I got a shortlist of five, and then I assessed them. I thought about market growth in different countries and I also did some research into suppliers. But there were other important factors as well. I wanted a product that didn't retail for too high a figure. I thought that since many people would be buying from the internet for the first time, they might be afraid to take a risk with large amounts of money. Woman: And what made you decide on books？ Man: Well, basically, I found out that books had an eighty-two billion dollar market world-wide. There's also a high demand for CDs - a product I nearly went for - but with books there's a much wider choice. There're 3 million items in the book category, but only 300,000 in CDs. This choice meant the capabilities of the computer - in organisation and selection - could be put to good use. Woman: Bookstore has certainly been very successful. Why do you think that is？ Man: Well, it's not been easy. For the first five years, it was a struggle raising funds and developing the right software. The ideas weren't the difficult bit. If you and I sat down here for an hour, we'd come up with a hundred good ideas. The hard bit is making those ideas work. There are several key elements, which for me were research, recruiting the right staff, and prioritising. Woman: And you're satisfied with your customer growth？ Man: Well, it was a bit slow at first but then it picked up and from May '97 we started to see our greatest growth. We went from a hundred and twenty million dollars annual sales revenue to two hundred and thirty million dollars by the end of that year, and from 340,000 customers to 15 million. 58% of them were repeat customers. By '98, sales had reached almost three hundred and ten million dollars. Woman: And is Bookstore's success reflected in its profits？ Man: Well, at the moment we're focusing on introducing ourselves to customers and we spend a lot on advertising. Anything else would be a poor management decision. But, of course, it's reflected in our final figures. It's not unusual for a four-year-old company like ours to be in an investment cycle. What is more unusual is for a young company like Bookstore to be sold on the stock market, which happened in July '97. Woman: Bookstore is well-known for its high- quality customer service. What is the secret of your success in this area？ Man: Well, firstly our books are delivered fast and any complaints are dealt with by email and what's important is that the email is always answered in a friendly way, with the emphasis on 'the customer is always fight'. In fact, customers sometimes feel guilty about complaining because Bookstore staff are so helpful! Regular customers are recognised when they go to our website, and we suggest titles to them, based on their previous purchases. Woman: Do you think Bookstore offers a better service than its competitors？ Man: Well, yes. We'd been in the market for about two years before most of our competitors started so we had a head start and although some have caught up now, we're still cheaper. Our book price includes tax and delivery. Most of our competitors' prices don't. But what's more important is that B A．he was earning yep/little in his job. B．he had reached the age for a career change. C．he had to respond to a business opportunity.

A．the deposit multiplier would be equal to one B．total reserves would be equal to required reserves C．the banking system would not be able to create money D．all of the above

A、at the port of shipment B、on the vessel C、before loading on board D、after loading on board 此题为多项选择题。

A．the deposit multiplier would be infinitely large B．required reserves would be equal to zero C．the banking system would theoretically be able to create an infinitely large amount of demand deposits D．all of the above

A．shrugged B．tugged C．jerked D．twisted

A．shrugged B．tugged C．jerked D．twisted

For a sport barely known in Britain five years ago, triathlon has grown at a sprinter's pace. This year the British Triathlon Association, the governing body, will sanction some 450 triathlons, duathlons (running and biking) and aquathlons (running and swimming). These vary from tough races aimed at endurance junkies to shorter events designed to lure newcomers. By far the most successful is the London triathlon, which, three weeks ago, brought 8,000—half of them first-timers—to the Royal Victoria Dock in east London. That made it the world's biggest. There are echoes of the jogging craze of the early 1980s. Both sports are American exports; both have grown partly thanks to television coverage. Inclusion in the Olympic and Commonwealth games has conferred credibility and state funding on triathlon. Even better, Britain's professional triathletes are doing rather well on the international circuit. There are practical reasons for the growth of the sport, too. Nick Rusling, event director of the London triathlon, points out that established events such as the London marathon and Great North Run are hugely over-subscribed (this year the marathon received 98,500 applications for 36,000 places). Triathlon offers a more reliable route to exhaustion, and a fresh challenge to athletes who are likely to cross-train anyway. The sport will not soon supplant "the great suburban Everest", as Chris Brasher, founder of the London marathon, described his event. The sport's tripartite nature means that putting on events is fiendishly complex, a fact reflected in high entry fees: competitors at last weekend's Ironman race forked out ￡220. Shorter events are cheaper, but participants must still provide their own bicycles and wetsuits and pay for training. Compared with the inhabitants of Newham, the London borough where this year's London triathlon was held, competitors appeared overwhelmingly white and middle class. Another drag on growth is a shortage of suitable venues in a small island—a problem exacerbated by safety fears. But that ought to be less of a hindrance in future. Two court decisions, in 2003 and earlier this year, have firmly established that the owners of large bodies of water may not be held responsible when adults injure themselves as a result of extravagant sporting actions. The meaning of the word "gruelling" in the first paragraph is most close to ______. A．competitive B．exhausting C．grand D．gruesome

Marketing, on the other hand, focuses on the wants of consumers. It begins with first analyzing the 【C5】______ and demands of consumers and then producing goods that will satisfy them. This eye-on-the-consumer approach is known as the marketing concept, which 【C6】______ means that instead of trying to sell whatever is easiest to produce or buy for resale, the makers and dealers first endeavor to find out what the consumer wants to buy and then go about making it available for purchase. This concept does not imply that business is benevolent or that consumer satisfaction is given priority over profit in a company. There are always two sides to every business transaction—the firm and the customer—and each 【C7】______ satisfied before trade occurs. Successful merchants and producers, however, recognize that the surest route to profit is through understanding and catering to customers. A 【C8】______ example of the importance of catering to the consumer presented itself in mid-1985, when Coca Cola changed the 【C9】______ of its drink. The non-acceptance of the new flavor by a significant portion of the public 【C10】______ a prompt restoration of the Classic Coke, which was then marketed alongside the new. King Customer ruled! 【C1】______ A．on B．with C．to D．towards

Then she drew her breath in with a gasp and half-rose to her feet. Standing with his back to the window and to her was a man. His hands were round the throat of a woman who faced him, and he was slowly, remorselessly, strangling her. Her eyes were staring from their sockets, her face was purple. As Mrs. McGillicuddy watched, fascinated, the end came; the body went limp and crumpled in the man's hands. At the same moment, Mrs. McGillicuddy's train slowed down again and the other began to gain speed. It passed forward and a moment or two later it had vanished from sight. Almost automatically Mrs. McGillicuddy's hand went up to the communication cord then paused, irresolute. After all, what use would it be ringing the cord of the train in which she was traveling？ The horror of what she had seen at such close quarters, and the unusual circumstances, made her feel paralysed. Some immediate action was necessary--but what？ The door of her compartment was drawn back and a ticket collector said, "Ticket, please." When Mrs. McGillicuddy's train passed through a station, it ______. A．gained speed suddenly B．kept its usual speed C．changed its speed D．stopped immediately

A．One with DNA containing both 15N and 14N B．Two, one with DNA containing only 15N and one with DNA containing only 14N C．Two, one with DNA containing both 15N and 14N and one with DNA containing only 14N D．Three, one with DNA containing only 15N, one with DNA containing both 15N and 14N and one with DNA containing only 14N

A、threaten the chickens B、encourage the chickens C、remind the chickens to stay calm and keep sober-minded D、persuade the chickens to keep escaping

A．for B．by C．with D．on