单选题The ocean bottom—a region nearly 2.5 times greater than the total land area of the Earth—is a vast frontier that even today is largely unexplored and uncharted. Until about a century ago, the deep-ocean floor was completely inaccessible, hidden beneath waters averaging over 3,600 meters deep. Totally without fight and subjected to intense pressures hundreds of times greater than at the Earth's surface, the deep-ocean bottom is a hostile environment to humans, in some ways as for-bidding and remote as the void of outer space. Although researchers have taken samples of deep-ocean rocks and sediments for over a century, the first detailed global investigation of the ocean bottom did not actually start until 1968, with the beginning of the National Science Foundation's Deep Sea Drilling Project (DSDP). Using techniques first developed for the offshore oil and gas industry, the DSDP's drill ship, the Glomar Challenger, was able to maintain a steady position on the ocean's surface and drill in very deep waters, extracting samples of sediments and rock from the ocean floor. The Glomar Challenger completed 96 voyages in a 15-year research program that ended in November 1983. During this time, the vessel logged 600,000 kilometers and took almost 20,000 core samples of seabed sediments and rocks at 624 drilling sites around the world. The Glomar Challenger's core samples have allowed geologists to reconstruct what the planet looked like hundreds of millions of years ago and to calculate what it will probably look like millions of years in the future. Today, largely on the strength of evidence gathered during the Glomar Challenger's voyages, nearly all earth scientists agree on the theories of plate tectonics and continental drift that explain many of the geological processes that shape the Earth. The cores of sediment drilled by the Glomar Challenger have also yielded information critical to understanding the world's past climates. Deep-ocean sediments provide a climatic record stretching back hundreds of millions of years, because they are largely isolated from the mechanical erosion and the intense chemical and biological activity that rapidly destroy much land-based evidence of past climates. This record has already provided insights into the patterns and causes of past climatic change—information that may be used to predict future climates.

单选题When people have no will to live, people are often very difficult to help.

单选题________a language family is a group of languages with a common origin and similar vocabulary, grammar, and sound system.

单选题______, I picked up the phone and rang my sister in AustraliA． A． Off impulse B． On guard C． Off guard D． On impulse

单选题It has calculated that the earth's circumference around the equator is over forty miles longer than that around the poles.

单选题Container-grown plants can be planted at any time of the year, but ______ in winter. A. should be B. would be C. preferred D. preferably

单选题Surely it doesn't matter where charities get their money from: what ______ much is what they do with it.

单选题Recent evidence has tended to be contraryy to established theories on this subject. A. in contradiction with B. in coincidence with C. in correspondence with D. in contrast with

单选题A reserved person is one who______speaks a little and______gets excited．

单选题The boss Utook it for granted/U that his secretary should keep him well-informed.

单选题He says, you must take in those responsibilities. A. take away B. take on C. take out D. take off

单选题 Computer programmer David Jones earns ￡35,000 a year designing new computer games, yet he cannot find a bank prepared to let him have a check card. Instead, he has been told to wait another two years, until he is 18. The 16-year-old works for a small firm in Liverpool, where the problem of most young people of his age is finding a job. David's firm releases two new games for the expanding home computer market each month. But David's biggest headache is what to do with his money. Despite his salary, earned by inventing new programs within fight schedules, with bonus payments and profit-sharing, he cannot drive a car, take out a mortgage, or obtain credit cards. He lives with his parents in their council house in Liverpool, where his father is a bus driver. His company has to pay ￡150 a month in taxi fares to get him the five miles to work and back every day because David cannot drive. David got his job with the Liverpool-based company four months ago, a year after leaving school with six O-levels and working for a time in a computer shop. "I got the job because the people who run the firm knew I had already written some programs," he said. "I suppose ￡35,000 sounds a lot but actually that's being pessimistic. I hope it will come to more than that this year." He spends some of his money on records and clothes, and gives his mother ￡20 a week. But most of his spare time is spent working. "Unfortunately, computing was not part of our studies at school," he said. "But I had been studying it in books and magazines for four years in my spare time. I knew what I wanted to do and never considered staying on at school. Most people in this business are fairly young, anyway." David added, "I would like to earn a million and I suppose early retirement is a possibility. You never know when the market might disappear."

单选题I am not______with my roommate, but I have to share the room with her, because I have nowhere to live. A． concerned B． compatible C． considerate D． complied

单选题The newspaper stories deliberately put down the actress's unattractive past.

单选题Losing a job or not being able to find one almost always brings unwelcome changes. If you've lost a job, the first feeling is often one of shock. On top of the loss of income, many people find the whole routine of their life is shattered, their contact with other people reduced, their ambitions halted and their identity as a worker removed. There may be good feelings too -- it' s nice to be able to lie in bed in the morning, to spend more time with children, or to have more time to think -- a better job may be just around the corner. But, unless a better job does turn up, chances are the days start getting longer and the time becomes harder to fill. Many people pass through periods of difficulty in sleeping and eating. They feel irritable and depressed, often isolated and lonely. Despite all these problems, unemployment can be a chance for a fresh start. You can discover that it provides an opportunity to sort out or rethink what you want from life and how best you can get it. You can use the time to plan how to find a new job, learn a new skill, develop your hobbies, see if you can run your own business, do some voluntary work in your community or meet new people. It's up to you.

单选题If he had told me earlier, I______like that.

单选题Shellfish give the deceptive appearance of enjoying a peaceful existence, although in fact life is a constant struggle for them.

单选题As an English major student at one of the most famous universities in China, I strongly believe that business English is more practical than other fields.

单选题A reserved person is one who______speaks a little and______gets excited． A．always...sometimes B．often...never C．never...sometimes D．always...seldom

单选题We should put our disputes aside before the committee and abide______its decisions.