单选题This research has attracted wide ______ coverage and has been featured on BBC television's Tomorrow's World. A. message B. information C. media D. data

单选题The word "pedestrian "(in boldface in Paragraph 5) is closest in meaning to ______.

单选题Medical equipment sold to doctors is an instance of ______.

单选题{{B}}Directions:{{/B}} Below each of the following passages you will find some questions or incomplete statements. Each question or statement is followed by four choices marked A, B, C and D. Read each passage carefully, and then select the choice that best answers the question or completes the statement. Mark the letter of your choice with a single bar across the square brackets on your Machine-scoring Answer Sheet.{{B}}Passage One{{/B}} The man who invented Coca-Cola was not a native Atlantan, but on the day of his funeral every drugstore in town testimonially shut up shop. He was John Styth Pemberton, born in 1833 in Knoxville, Georgia, eighty miles away. Sometimes known as Doctor, Pemberton was a pharmacist who, during the Civil War, led a cavalry troop under General Joe Wheeler. He settled in Atlanta in 1869, and soon began brewing such patent medicines as Triplex Liver Pills and Globe of Flower Cough Syrup. In 1885, he registered a trademark for something called French Wine Coca—Ideal Nerve and Tonic Stimulant; a few months later he formed the Pemherton Chemical Company, and recruited the services of a bookkeeper named Frank M. Robinson, who not only had a good head for figures but, attached to it, so exceptional a nose that he could audit the composition of a batch of syrup merely by sniffling it. In 1886, a year in which, as contemporary Coca-Cola officials like to point out, Conan Doyle unveiled Sherlock Holmes and France unveiled the Statue of Liberty-Pemberton unveiled a syrup that he called Coca-Cola. It was a modification of his French Wine Coca. He had taken out the wine and added a pinch of caffeine, and, when the end product tasted awful, had thrown in some extract of cola nut and a few other oils, blending the mixture in a three-legged iron pot in his back yard and swishing it around with an oar. He distributed it to soda fountains in used beer bottles, and Robinson, with his flowing bookkeeper's script, presently devised a label, on which "Coca-Cola" was written in the fashion that is still employed. Pemberton looked upon his mixture less as a refreshment than as a headache cure, especially for people whose headache could be traced to over-indulgence. On a morning late in 1886, one such victim of the night before dragged himself into an Atlanta drugstore and asked for a dollop of Coca-Cola. Druggists customarily stirred a teaspoonful of syrup into a glass of water, but in this instance the man on duty was too lazy to walk to the fresh-water tap, a couple of feet off. Instead, he mixed the syrup with some soda water, which was closer at hand. The suffering customer perked up almost at once, and word quickly spread that the best Coca-Cola was a fizzy one.

单选题Tom is always lack of self-confidence. His ______ character called him to miss many golden opportunities.

单选题6 Even in fresh water sharks hunt and kill. The Thresher shark, capable of lifting a small boat out of the water, has been sighted a mile inland on the Fowey River in Corn wall. Killer sharks swim rivers to reach Lake Nicaragua in Central America; they average one human victim each year. Sewage and garbage attract sharks inland. When floods carry garbage to the rivers they provide a rich diet which sometimes stimulates an epidemic of shark attacks. Warm water generally provides shark food, and a rich diet inflames the shark's aggression. In British waters sharks usually swim peacefully between ten and twenty miles off shore where warm water currents fatten mackerel and pilchards for their food. But the shark is terrifyingly unpredictable. One seaman was severely mauled as far north as Wick in Scotland. Small boats have been attacked in the English Channel, Irish Sea and North Sea. Most of the legends about sharks are founded in ugly fact. Even a relatively small shark—a 200 lb. Zambezi—can sever a man's leg with one bite, Sharks have up to seven rows of teeth and as one front tooth is damaged or lost another moves forward to take its place. The shark never sleeps. Unlike most fish, it has no air bladder, and it must move constantly to avoid sinking. It is a primitive creature, unchanged for sixty million years of evolution. Its skin is without the specialized scales of a fish. Fully grown, it still has five pairs of separate gills like a three-week human embryo. But it is a brilliantly efficient machine. Its skin carries nerve endings which can detect vibrations from fish moving several miles away. Its sense of smell, the function of most of its brain, can detect one part in 600,000 of tuna fish juice in water, or the blood of a fish or animal from a quarter of a mile away. It is colour blind, and sees best in deep water, but it can distinguish shapes and patterns of light and shade easily. Once vibrations and smell have placed its prey the shark sees well enough to home in by vision for the last fifty feet. The shark eats almost anything. It will gobble old tin cans and broken bottles as well as fish, animals and humans. Beer bottles, shoes, wrist watches, car number plates, overcoats and other sharks have been found in dead sharks. Medieval records tell of entire human corpses still encased in armour. The United States military advice on repelling sharks is to stay clothed—sharks go for exposed flesh, especially the feet. Smooth swimming at the surface is essential. Frantic splashing will simply attract sharks, and dropping below the surface makes the swimmer an easy target. If the shark gets close, then is the time to kick, thrash and hit out. A direct hit on the snout, gills, or eyes will drive away most sharks. The exception is the Great White shark. It simply kills you.

单选题The English speaker has at his disposal a vocabulary and a set of grammatical rules which enable him to communicate his thoughts and feelings, in a variety of styles, to the other English speakers. His vocabulary, in particular, both that which he uses actively and that which he recognizes, increases in size as he grows old, as a result of education and experience. A. at his disposal B. enable C. the other D. both that which

单选题Huntington and many of its competitors are working to make remedial instruction a commodity as ______ and accessible as frozen yogurt.

单选题Initial reports were that multiple waves of warplanes bombed central Baghdad, hitting the oil refineries and the airport.

单选题The antigen-antibody immunological reaction used to be regarded as typical of immunological responses. Antibodies are proteins synthesized by specialized cells called plasma cells, which are funned by lymphocytes (cells from the lymph system when an antigen, a substance foreign to the organism's body, comes in contact with lymphocytes. Two important manifestations of antigen- antibody immunity are lysis, the rapid physical rupture of antigenic cells and the liberation of their contents into the surrounding medium, and phagocytosis, a process in which antigenic particles are engulfed by and very often digested by macrophages and polymorphs. The process of lysis is executed by a complex and unstable blood constituent known as complement, which will not work unless it is activated by a specific antibody; the process of pbagocytosis is greatly facilitated when the particles to be engulfed are coated by a specific antibody directed against them. The reluctance to abandon this hypothesis, however well it explains specific processes, impeded new research, and for many years antigens and antibodies dominated the thoughts of immunologists so completely that those immunologists overlooked certain difficulties. Perhaps the primary difficulty with the antigen-antibody explanation is the informational problem of how an antigen is recognized and how a structure exactly complementary to it is then synthesized. When molecular biologists discovered, moreover, that such information cannot flow from protein to protein, hut only from nucleic acid to protein, the theory that an antigen itself provided the mold that directed the synthesis of an antibody had to be seriously qualified. The attempts at qualification and the information provided by research in molecular biology led scientists to realize that a second immunological reaction is mediated through the lymphocytes that are hostile to and bring about the destruction of the antigen. This type of immunological response is called cell- mediated immunity. Recent research in cell-mediated immunity has been concerned not only with the development of new and better vaccines, but also with the problem of transplanting tissues and organs from one organism to another, for although circulating antibodies play a part in the rejection of transplanted tissues, the primary role is played by cell-mediated reactions. During cell-mediated responses, receptor sites on specific lymphoeytes and surface antigens on the foreign tissue cells form a complex that binds the lymphocytes to the tissue. Such lymphocytes do not give rise to antibody- producing plasma cells but themselves bring about the death of the foreign-tissue cells, probably by secreting a variety of substances, some of which are toxic to the tissue cells and some of which stimulate increased phagocyte activity by white blood cells of the macrophage type. Cell-mediated immunity also accounts for the destruction of intracellular parasites.

单选题I'll have to ______ this dress a bit before the wedding next week. A. let off B. let go C. let loose D. let out

单选题Every year a number of students graduate from the school which will ______ new students the first week in September.

单选题The Taganka production Poslushaite ("Listen"), culled from statements and works of Vladimir Mayakovsky, proved to be a singular exception.

单选题In this way people will get themselves ______ talking about certain issues. A. involved in B. taken in C. given in D. gone into

单选题Recent research from animal behaviorists suggests that "as the crow flies" should no longer be taken to mean "the shortest distance between two points." Zoologists at Oxford University, 1 conducted an eighteen-month 2 of homing pigeons, have concluded that under some circumstances, pigeons follow 3 visual landmarks to find their way home 4 than taking the shortest, most direct route. 5 for their ability to navigate long distances, homing pigeons use the 6 of the sun and stars, their inbuilt compasses, and perhaps also their sense of smell to direct their flight over long 7 or on a journey for the first time. 8 , different factors appear to affect a pigeon"s navigation 9 it is released close to its 10 . Animal behaviorists reached this 11 after attaching small global positioning devices to the backs of pigeons and releasing them a few miles from their home. These devices enabled the scientists to 12 the precise location of each pigeon every second of 13 flight. Each pigeon was tracked for approximately twenty flights from the 14 point. For the first several flights, each bird"s path 15 significantly from the paths it had taken 16 . Subsequently, 17 , the bird would tend to follow the same path, 18 after flight, even though that path was not always the most direct route home. The scientists concluded that pigeons use a 19 of familiar visual landmarks to find their way when they are near their home rather than relying primarily on compass navigation. Major highways are one 20 landmark. Almost comically, some of the pigeons followed the path of a major highway they could see below them, turning where the road turned, and even following the circular path of the exit ramps.

单选题The doctor told the students that a(n)______ disease was one that could be passed from one person to another.(2007 年中国矿业大学考博试题)

单选题This ______ shows that John Williams has completed the school-work of the eighth grade.

单选题He was in low spirits. Try as we would, we couldn't get him to______up.