单选题WhatdoesAlice'sfatherwanttobuyforher?A.Asweater.B.Awatch.C.Aredbike.

单选题 It was not "the comet of the century" experts predicted it might be. However, Kohoutek has provided a bonanza of scientific information. It was first spotted 370 million miles from Earth, by an astronomer who was searching the sky for asteroids, and after whom the comet was named. Scientists who tracked Kohoutek the ten months before it passed the Earth predicted the comet would be a brilliant spectacle. But Kohoutek fell short of these predictions, disappointing millions of amateur sky watchers, when it proved too pale to be seen with the unaided eye. Researchers were very happy nonetheless with the new information they were able to glean from their investigation of the comet. Perhaps the most significant discovery was the identification of two important chemical compounds—methyl cyanide and hydrogen cyanide—never before seen in comets, but found it the far reaches of interstellar space. This discovery revealed new clues about the origin of comets. Most astronomers agree that comets are primordial remnants from the formation of the solar system, but whether they were born between Jupiter and Neptune or much farther out toward interstellar space has been the subject of much debate. If compounds no more complex than ammonia and methane, Key components of Jupiter, were seen in comets, it would suggest that comets form within the planetary orbits. But more complex compounds, such as the methyl cyanide found in Kohoutek, point to formation far beyond the planets; there the deep freeze of space has kept them unchanged.

单选题Which of the following is NOT true of security attacks?

单选题The author's attitude towards a large quantity of information on the net is

单选题After the Anasazi abandoned southwestern Colorado in the late 1200s or early 1300s, history's pages are blank. The Anasazi were masons and apartment builders who occupied the deserts, river valleys, and mesas of this region for over a thousand years, building structures that have weathered the test of time. The first Europeans to visit southwestern Colorado were the ever- restless, ambitious Spanish, who sought gold, pelts, and slaves. In1765, under orders from the Spanish governor in Santa Fe, Juan Maria Antonio Rivera led a prospecting and trading party into the region. Near the Dolores River in southwestern Colorado, he found some insignificant silver-bearing rocks, and it is thought that it was he who named the mountains nearby the Sierra de la Plata or the Silver Mountains. Rivera found little of commercial value that would interest his superiors in Santa Fe, but he did open up a route that would soon lead to the establishment of the Old Spanish Trail. This expedition and others to follow left names on the land which are the only reminders we have today the Spanish once explored this region. In 1776, one of the men who had accompanied Rivera, Andre Muniz, acted as guide for another expedition. That party entered southwestern Colorado in search of a route west to California, traveling near today's towns of Durango and Dolores. Along the way, they camped at the base of a large green mesa which today carries the name Mesa Verde. They were the first Europeans to record the discovery of an Anasazi archaeological site m southwestern Colorado. By the early 1800s, American mountain men and trappers were exploring the area in their quest for beaver pelts. Men like Peg-leg Smith were outfitted with supplies in the crossroads trapping town of Taos, New Mexico. These adventurous American trappers were a tough bunch. They, possibly more than any other newcomers, penetrated deeply into the mountain fastness of southwestern Colorado, bringing back valuable information about the area and discovering new routes through the mountains. One of the trappers, William Becknell, the father of the Santa Fe Trail, camped in the area of Mesa Verde, where he found pottery shards, stone houses, and other Anasazi remains.

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单选题 "Dinosaur" is the story of a young Iguanodon dinosaur whose life is uprooted when a meteor hits the planet and he and his family are forced to look for a new home. "It's about characters who have to face adversity and stick together," Schumacher said, a human story told with animals. But he admits the real achievement of "Dinosaur" is taking digitally created characters and blending them with real images like waves crashing on the beach or clouds floating in the sky. This creates "a live-action type of film." To be different from traditional cartoons, "Dinosaur" attempts to re-create the real-life existence of dinosaurs. And the talking animals offer simple lessons in how to live. In short, it is vintage Disney. The 90-minute movie took more than five and a half years to produce, and Disney built a huge campus in Burbank, California for the new digital studio, called "The Secret Lab, "that would create "Dinosaur." While a typical live-action film takes about two years to make from beginning to the cinema, Disney animators took 18 months just to make a "test" version of the film to see if it could be done. Four years later, they have "Dinosaur," and early reviews are ecstatic. Trade newspaper Daily Variety called it "an eye-popping visual spectacle that serves up a vivid picture of what the planet might have looked like." The film follows the life of Aladar, an Iguanodon--a sort of cow-like animal weighing up to five tons--who is separated from his herd and raised by a family of primates called Lemurs. Aladar, voiced by actor D. B. Sweeney, feels the Lemurs are his kin. But he is actually an outsider. When a meteor hits Earth, Aladar saves his family from the fire and devastation that follow and they find themselves on a quest for food and water. While on their trek, they meet other prehistoric beasts all looking for a safe nesting ground. During the journey, Aladar fights with the herd's leader, Kron, falls in love with Kron's sister, Neera, and teaches the other dinosaurs that if they all work together they can achieve a common goal. The scenery is bright and beautiful. When herd members locate their nesting paradise, the sky is the bluest of blue, the grass a deep green, and the water looks cool and inviting. The film is rated PG, meaning parental guidance is suggested because of its violence.

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单选题What does this paragraph imply?

单选题Although there had been various small cameras developed, it was not until George Eastman introduced the Kodak in 1888 that the mass appeal of photography attracted America and Europe and thereafter spread quickly to the far corners of the earth. Eastman called his new famous camera the Kodak for no particular reason except that he liked the word. It was easy to remember and could be pronounced in any language. An immediate consequence of Eastman's invention was a blizzard of amateur photographs that soon became known as snapshots. The word came from hunters' jargon. When a hunter fired a gun from the hip, without taking careful aim, it was described as a snapshot. Photographers referred to the process of taking pictures as shooting, and they would take pride in a good day's shoot the way country gentlemen would boast about the number of birds brought down in an afternoon. Photography became not only easy but fun because of the Kodak. Almost overnight photography became one of the world's most popular hobbies. A new and universal folk art was born; the showing of one's latest pictures and the creation of family albums became popular social pastimes. Camera clubs and associations numbered their members in the millions. One ardent amateur was the French novelist Emile Zola, who took a lot of photographs of his family, friends, and travels. Interviewed about his favorite hobby in 1900, he observed, "I think you cannot say you have thoroughly seen anything until you have got a photograph of it." "The little black box," as the Kodak was affectionately dubbed, revolutionized the way people communicated. "A picture is worth a thousand words" was the claim and there were literally billions of pictures. In one year alone -- 1988, the centenary of the invention of the Kodak -- it is estimated that almost thirty billion were taken in America alone. The impact of the sale of photographic equipment on the economy is equally mind-boggling. Photography has played an essential role in the media revolution. It has greatly enhanced our ability to convey information, so that the concept of the global village has become a commonplace. Photographs have greatly extended our understanding of and compassion for our fellow human beings. Did Mr. Eastman have the faintest idea of the power residing in his "little black box"?

单选题The largest lake in Britain is [A] Loch Lomond. [B] the Lough Neagh. [C] Windermere. [D] Ullswater.

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