单选题 阅读下面这篇短文，短文后列出7个句子，请根据短文的内容对每个句子做出判断。 {{B}}Smoking{{/B}} Since 1939, numerous studies have been conducted to determine whether smoking is a health hazard. The trend of the evidence has been consistent and indicates that there is a serious health risk. Research teams have conducted studies that show beyond all reasonable doubt that tobacco smoking is associated with a shortened life expectancy. Cigarette smoking is believed by most research workers in this field to be an important factor in the development of cancer of the lungs and cancer of the throat and is believed to be related to cancer of some other organs of the body. Male cigarette smokers have a higher death rate from heart disease than non-smoking males. Female smokers are thought to be less affected because they do not breathe in the smoke so deeply. Apart from statistics, it might be helpful to look at what smoking tobacco does to the human body. Smoke is a mixture of gases, vaporized chemicals, minute particles of ash and other solids. There is also nicotine, which is powerful poison, and black tar. As smoke is breathed in, all those components form deposits on the membranes of the lungs. One point of concentration is where the air tube and bronchus divides. Most lung cancer begins at this point. Filters and low tar tobacco are claimed to make smoking to some extent safer, but they can only slightly reduce, not eliminate the hazards.

单选题Corporations A corporation is a firm owned by one or more individuals who own shares of stock that define ownership and rights to profits. Liability is limited to the value of corporation assets. Although corporations constitute the smallest category of business organization in the United States, they conduct most of the business. In 1998. corporations accounted for just 19 percent of the total number of firms in the economy but 90 percent of total business revenuers. From these numbers we can infer that many large firms are corporations and that this form of business organization possesses certain advantages over the proprietorship and the partnership in conducting large-scale production and marketing. In a corporation, ownership is divided into equal parts called shares of stock. Shares are the equal portions into which ownership of a corporation is divided. If any stockholder dies or sells out to a new owner, the existence of the business organization is not terminated or endangered as it is in a proprietorship or partnership. For this reason the corporation is said to possess the feature of continuity(连续性). Another feature that makes the corporation radically different from other forms of business organization is share transferability—the right of owners to transfer their shares by sale or gift without having to obtain the permission of other shareholders(股东). For many large organizations, shares of stock are traded on a stock market such as the New York Stock Exchange. Other corporations, however, are smaller, and their shares are traded so seldom that they are not even listed on formal stock exchanges. The shares of these firms are traded by in- dependent stockbrokers(股票经纪人) on the over-the-counter market. Share transferability is the most economically important feature of the corporation; in fact, share transferability is one reason for the origin of the corporation. It allows owners and managers to specialize, increasing efficiency and profitability in the firm. Owners of stock in a corporation do not need to be concerned with the day-to-day operations of the firm. All that owners need to do is observe the changing price of the firm's shares on the stock market to decide whether the company is being competently managed if they are dissatisfied with the performance of the company, they can sell their stock. Managers, on the other hand, specialize in reviewing the day-to-day operations of the corporation. Still another feature of the corporation is limited liability. Corporate shareholders are responsible for the debts or liabilities of the corporation only to the extent that they have invested in it. Many investors preferinvestments in which their risk of personal loss is strictly limited; the amount of direct investment in corporations is therefore increased as a result of the limited liability involved.

单选题I'd very much like to know what your aim in life is

单选题A health profile is a portrait of all of the factors that influence your health. To draw your health profile, you will need to know what diseases run in your family, what health hazards you may be exposed to at work, how your daily diet compares to the recommended standards, how much time per week you spend exercising and what type of exercise you engage in, how stressful your work and family environments are, what kinds of illnesses you get regularly, and whether or not you have any one of a number of addictions. To complete this portrait, you should have a checkup to determine how your blood, heart, and lungs are functioning. This checkup will serve as a baseline (基础，起点), to which you can then compare later tests. What is a health profile?A. A general description of all the factors that influence one's health.B. A speculation on one's habits both at home and work.C. A review of one's medical history in the past few years.D. A phyrsical checkup on one's health status.

单选题In prehistoric times people seldom stayed anywhere for very long because their food supply usually ran out .

单选题Mr. Henly has accelerated his sale of shares over the past year.

单选题Nightingale played a great role in

单选题Some drugs taken in large quantities cause permanent brain damage. A. temporary B. intermittent C. lasting D. instant

单选题You have to be patient if you want to sustain your position.

单选题{{B}}第二篇{{/B}} {{B}} Knitting{{/B}} My mother knew how to knit(编织), but she never taught me. She assumed, as did many women of her generation, that knitting was no longer a skill worth passing down from mother to daughter. A combination of feminism (女权主义), consumerism (消费主义) and household gadgetry made many women feel that such homely accomplishments were now obsolete. My grandmother still knitted, though, and every Christmas she made a pair of socks for my mother and me, of red wool. They were the ones we wore under our ice skates (冰鞋) , when it was really important to have warm feet. Knitting is a nervous habit that happens to be productive. It helped me quit smoking by giving my hands something else to do. It is wonderful for depression because no matter what else happens, you are creating something beautiful. Time spent in front of the television or just sitting is no longer time wasted. I love breathing life into the patterns. It's true magic, finding a neglected, dog-eared old book with the perfect snowflake design, buying the same Germantown knitting worsted my grandmother used, in the exact blue to match my daughter's eyes, taking it on the brain with me every day for two months, working feverishly to get it done by Christmas, staying up late after the stockings are filled to sew in the sleeves and weave in the ends. Knitting has taught me patience. I know that if I just keep going, even if it takes months, there will be a reward. When I make a mistake, I know that anger will not fix it, that I just have to go back and take out the stitches (针脚) between and start over again. People often ask if I would do it for money, and the answer is always a definite no. In the first place, you could not pay me enough for the hours I put into a sweater. But more important this is an activity I keep separate from such considerations. I knit to cover my children and other people I live in warmth and color. I knit to give them something earthly that money could never buy. Knitting gives my life an alternative rhythm to the daily deadline. By day I can write about Northern Ireland or the New York City Police Department and get paid for it, but on the time train home, surrounded by people with laptops, I stage my little rebellion. I take out my old knitting bag and join the centuries of women who have knitted for love.

单选题About one million Americans are diagnosed annually with skin cancer.

单选题They thought his behavior was abnormal .

单选题John is {{U}}crazy{{/U}} about pop music. A. sorry B. mad C. concerned D. worried

单选题It is hard for the young people to imagine what severe conditions their parents once lived under.

单选题In Dr. Rose's test, frogs with cut-off legs

单选题 The Greatest Mystery Of Whales The whale is a warm-blooded, air-breathing animal, giving birth to its young alive, sucking them—and, like all mammals, originated on land. There are many front flippers (鳍状肢), used for steering and stability, are traces of feet. {{U}} {{U}} 1 {{/U}} {{/U}}of this. Its Immense strength is {{U}} {{U}} 2 {{/U}} {{/U}}into the great body of the big whales, and in fact most of a whale's body is one gigantic muscle. The blue whale's pulling strength has been estimated {{U}} {{U}} 3 {{/U}} {{/U}}400 horsepower. One specimen was reported to have towed (拖) a whaling vessel for seven hours at the {{U}} {{U}} 4 {{/U}} {{/U}}of eight knot (节). An angry whale will {{U}} {{U}} 5 {{/U}} {{/U}}A famous example of this was the fate of Whaler Essex, {{U}} {{U}} 6 {{/U}} {{/U}}was sunk off the coast of South America early in the last century. More recently, steel ships have {{U}} {{U}} 7 {{/U}} {{/U}}their plates buckled (使弯曲) in the same way. Sperm whales (抹香鲸) were known to seize the old-time whaleboats in their jaws and crush them. The greatest {{U}} {{U}} 8 {{/U}} {{/U}}of whales is their diving ability. The sperm whale dives to the Bottom for his {{U}} {{U}} 9 {{/U}} {{/U}}food, the octopus (章鱼). In that search he is known to go as far Down as 3200 feet, where the. {{U}} {{U}} 10 {{/U}} {{/U}}is 1400 pounds, to a square inch. Doing so he will {{U}} {{U}} 11 {{/U}} {{/U}}underwater long as one hour. Two special skills are involved in this storing up enough {{U}} {{U}} 12 {{/U}} {{/U}}(all whales are air—breathed) and tolerating the great change in pressure. Just how he does it scientists have not {{U}} {{U}} 13 {{/U}} {{/U}}. It is believed that some of the oxygen is stored in a special {{U}} {{U}} 14 {{/U}} {{/U}}of blood vessels, rather than just held in the lungs. And it is believed that a special kind of oil in his head is some sort of compensating mechanism that {{U}} {{U}} 15 {{/U}} {{/U}}adjusts the internal pressure of his body. But since you can't bring a live whale into the laboratory for study, no one knows just how these things work.

单选题The conference explored the possibility of closer trade links. A. denied B. investigated C. stressed D. created

单选题Doctors are required to keep patients' records completely {{U}}confidential{{/U}}. A. detailed B. secret C. accurate D. confident

单选题She gave us an {{U}}ambiguous{{/U}} answer. A. apparent B. unclear C. appalling D. indifferent

单选题We derive information mainly from the Internet.