单选题What is the most suitable title for the passage?

单选题The speculation that if archaeologists were to analyze their own society's refuse they would discover something ______.

单选题[此试题无题干]

单选题Among characters of Leadville's golden age were H. A. W. Tabor and his second wife, Elizabeth McCourt. Their history is fast becoming one of the legends of the Old West. He went to Kansas in 1855. Perhaps he was lured by rumors of fortunes to be made in Colorado mines. So a few years later he moved west to the small Colorado mining camp known as California Gulch, which he later renamed Leadville when he became its leading citizen. "Great deposits of lead are sure to be found here. " he said. As it turned out, it was silver that was to make Leadville's fortune and wealth. Tabor knew little about mining himself, so he opened a general store. It was his custom to "grubstake" prospective miners to supply them with food and supplies, or "grub", while they looked for ore, in return for which he would get a share in the mine if one was discovered. He did this for a number of years, but no one that he aided ever found anything of value. Finally one day in the year 1878, two miners came in and asked for "grub". Tabor had dec ded to quit supplying it for having lost too much money that way. They were persistent, however, and Tabor was too busy to argue with them. "Oh help yourself. One more time won't make any difference," he said and went on selling shoes and hats. The two miners took ＄17 worth of supplies, in return for which they gave Tabor a one-third interest in their findings. They picked a barren place and began to dig. After nine days they struck a rich vein of silver. Tabor bought the shares of the other two men, and so the mine belonged to him alone. This mine, known as the "Pittsburgh Mine," made ＄1,300,000 for Tabor in return for his ＄17 investment. Later Tabor bought the Matchless Mine on another barren hillside just outside the town for ＄117,000. This turned out to be even more fabulous than the Pittsburgh, yielding ＄ 35,000 wor:h of silver per day at one time. Leadville grew. Tabor became its first mayor, and later became lieatenant governor of the state.

单选题Directions: Read the following text. Answer the questions on each text by choosing A, B, C or D. Even plants can run a fever, especially when they're under attack by insects or disease. But unlike humans, plants can have their temperature taken from 3000 feet away—straight up. A decade ago, adapting the infrared (红外线) scanning technology developed for military purposes and other satelities, physicist Stephen Paley came up with a quick way to take the temperature of crops to determine which ones were under stress. The goal was to let farmers precisely target pesticide (杀虫刹) spraying rather than rain poison on a whole field, which invariably includes plants that don't have pest (害虫) problems. Even better, Paley's Remote Scanning Services Company could detect crop problems before they became visible to the eye. Mounted on a plane flown at 3000 feet at night, an infrared scanner measured the heat emitted by crops. The data were transformed into a color-coded map showing where plants were running "fevers". Farmers could then spot-spray, using 50 to 70 percent less pesticide than they otherwise would. The bad news is that Paley's company closed down in 1984, after only three years. Farmers resisted the new technology and long-term backers were hard to find. But with the renewed concern about pesticides on produce, and refinements in infrared scanning, Paley hopes to get back into operation. Agriculture experts have no doubt that the technology works. "This technique can be used on 75 percent of agricultural land in the United States, "says George Oerther of Texas A & M. Ray Jackson, who recently retired from the Department of Agriculture, thinks remote infrared crop scanning could be adopted by the end of the decade. But only if Paley finds the financial backing which he failed to obtain 10 years ago.

单选题What'stheprobablerelationshipbetweenthetwospeakers?

单选题Questions 22～25 are based on the following dialogue.

单选题What is true of Winchester's fringe theatre, "The North Poles?"

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单选题 {{I}}Questions 15 to 18 are based on the passage you have just heard.{{/I}}

单选题Most young people enjoy physical activities, walking, cycling, football, or mountaineering. These who have a passion (26) climbing high and difficult mountains are often (27) with astonishment. Why are men and women (28) to suffer cold and hardship, and to (29) on high mountains? This astonishment is caused, probably, by the difference between mountaineering and other forms of activities (30) which men give their leisure. There are no man-made rules, as there are for (31) games as golf and football. There are, of course, rules of different kinds which it would be dangerous to (32) , but it is this freedom from man-made rules (33) makes mountaineering attractive to many people. Those who climb mountains are free to use their own (34) . If we (35) mountaineering with other more familiar sports, we might think that one big difference is (36) mountaineering is not a "team work". However, it is only our misunderstanding. There are, in fact, no "matches" (37) "teams" of climbers, but when climbers are on a rock face. linked by a rope on which their lives may (38) , obviously, there is teamwork. A mountain climber knows that he may have to fight with natural (39) that are stronger and more powerful than man. His sport requires high mental and (40) qualities. A mountain climber (41) to improve on skill year after year. A skier is probably past his best by the age of thirty, and most international tennis champions (42) in their early twenties. But it is not (43) for men of fifty or sixty to climb the highest mountains in the Alps. They may take more (44) than younger men, but they probably climb with more skill and less (45) of effort, and they certainly experience equal enjoyment.

单选题Howdidthewomancome?A.Bytrain.B.Onfoot.C.Bybus.

单选题What is the most important for you to consider when somebody says "I love you" to you?