单选题Some memnbers of the committee suggested that the meeting______.

单选题He claims to be an expert in astronomy, but ______ he knows about it is out of date and inaccurate. A. so much B. how much C. what little D. so little

单选题The first ______ in the development of civilized man were probably the invention of primitive weapons and the discovery of fire.

单选题Retail sales volume in local urban and rural areas rose 57.8% and 46.8% ______ last year. A. individually B. respectively C. correspondingly D. accordingly

单选题{{B}}21-25{{/B}} For centuries, explorers have risked their lives venturing into the unknown for reasons that were to varying degrees economic and nationalistic. Columbus went west to look for better trade routes to the Orient and to promote the greater glory of Spain. Lewis and Clark journeyed into the American wilderness to find out what the U.S. had acquired when it purchased Louisiana, and the Apollo astronauts rocketed to the moon in a dramatic show off technological muscle during the cold war. Although their missions blended commercial and political-military imperatives, the explorers involved all accomplished some significant science simply by going where no scientists had gone before. Today Mars looms (隐约出现) as humanity's next great terra incognita (未探明之地). And with doubtful prospects for a short-term financial return, with the cold war a rapidly fading memory and amid a growing emphasis on international cooperation in large space ventures, it is clear that imperatives other than profits or nationalism will have to compel human beings to leave their tracks on the planet's reddish surface. Could it be that science, which has long played a minor role in exploration, is at last destined to take a leading role? The question naturally invites a couple of others: are there experiments that only humans could do on Mars? Could those experiments provide insights profound enough to justify the expense of sending people across interplanetary space? With Mars the scientific stakes are arguably higher than they have ever been. The issue of whether life ever existed on the planet, and whether it persists to this day, has been highlighted by mounting evidence that the Red Planet once had abundant stable, liquid water and by the continuing controversy over suggestions that bacterial fossils rode to Earth on a meteorite (陨石) from Mars. A more conclusive answer about life on Mars, past or present, would give researchers invaluable data about the range of conditions under which a planet can generate the complex chemistry that leads to life. If it could be established that life arose independently on Mars and Earth, the finding would provide the first concrete clues in one of the deepest mysteries in all of science: the prevalence of life in the universe.

单选题After a 300 million yuan renovation project, Lidai Diwang Miao, or the Imperial Temple of Emperors of Successive Dynasties, was reopened to the public last weekend. Originally constructed about 470 years ago, during the reign of Emperor Jiajing of the Ming Dynasty, the temple was used by emperors of both the Ming and Qing to offer sacrifices to their ancestors. It underwent two periods of renovation in the Qing Dynasty, during the reigns of emperors Yongzheng and Qianlong. From 1929 until early 2000, it was part of Beijing No. 159 Middle School. The temple's Jingdechongsheng Hall contains stone tablets memorializing 188 Chinese emperors. The Jinzhuan bricks used to pave the floor, the same as those used in the Forbidden City, are finely textured and golden-yellow in color. According to Xi Wei, an official from the Xicheng District government present at the reopening of the temple, Jinzhuan bricks were made in Yuyao, Suzhou, specially for imperial use. The renovation was done strictly according to that carried out at the orders of Emperor Qianlong, and only those sections of the temple too damaged to repair have been replaced.

单选题A: Sorry to bother you, but could you tell me the way to Sunset Road? B: ______ A. Sorry I couldn't help. B. Yes. What can I do for you? C. I'm afraid I have no idea. D. It's not too far from here, is it?

单选题{{B}}Passage 4{{/B}} Imagine fishermen walking down to the seashore, ready to carry out their early morning routine of preparing their boats and net. {{U}}(1) {{/U}} they hope for a good catch of fish. But to their {{U}}(2) {{/U}}, a horrible sight meets their still sleepy eyes. Thousands of fish have washed {{U}}(3) {{/U}} dead. The cause of this mass destruction? A red tide! Red tides are a global {{U}}(4) {{/U}}. They have been observed on both the Atlantic and the Pacific coasts of the United States and Canada. They have also {{U}}(5) {{/U}} in many other places. Though relatively few people are {{U}}(6) {{/U}} them, red tides are not new. In the Philippines, a red tide was first seen in the province of Bataan in 1908. Since then, red tides have been seen in many other {{U}}(7) {{/U}}. A Philippines red tide expert told us that " {{U}}(8) {{/U}} the fish kills, the Philippines has documented 1, 96 cases of dead shellfish poisoning caused by red tides." The term “red tide”{{U}} (9) {{/U}} the discoloration of water that sometimes occurs in certain areas of the ocean or sea. Although the color is often red, it may also be {{U}}(10) {{/U}} of brown or yellow. The World Book Encyclopedia reports that "the discolored areas may range from {{U}}(11) {{/U}} a few square yards to more than 2,600 square kilometers." What causes such discoloration? Red tides are generally caused by several {{U}}(12) {{/U}} of single-celled organisms. These tiny organisms have hair-like projections which they use to {{U}}(13) {{/U}} themselves in water. There are about 2,000 varieties of these organisms, 10 of which carry poisonous {{U}}(14) {{/U}} These minute organisms usually stay in warm waters with high content of salt. A red tide occurs when there is a sudden and rapid {{U}}(15) {{/U}} of these organisms. The concentration of these organisms may {{U}}(16) {{/U}} to 50,000,000 per quart of water! Although scientists do not fully understand why this happens, it is known that these organisms {{U}}(17) {{/U}} when certain conditions simultaneously affect the water. These include abnormal weather, {{U}}(18) {{/U}} temperatures, an oversupply of nutrients in the water, a generous {{U}}(19) {{/U}} sunlight, and favorable water currents. When a heavy rainfall occurs, minerals and other nutrients are sometimes washed {{U}}(20) {{/U}} the land into coastal waters. These nutrients can contribute to the breeding of the organisms. The result? Red tides!

单选题There were a number of people already ______ on the platform.

单选题Which of the following do they not prefer?

单选题The researchers have come up with numerous explanations to ______ their failures.

单选题 Passage 1 Over an extended period of time it is possible for potential firms to enter or for existing firms to leave a competitive industry. In the competitive world, shifts in the productive {{U}}(1) {{/U}} of the economy from any one line of production to others would {{U}}(2) {{/U}} in this way. The length of the time period {{U}}(3) {{/U}} for entry and/or exit will vary, depending upon the {{U}}(4) {{/U}} involved. Some, like hot dog stands, may be easily and quickly {{U}}(5) {{/U}}. Others, like textile mills, will require a longer planning and construction period. Whatever the time {{U}}(6) {{/U}} necessary for firms to enter or exit a given industry, we {{U}}(7) {{/U}} that period as the long run for that industry. For different industries, the long run will encompass different time spans. The force that {{U}}(8) {{/U}} the entry of new firms into an industry is profit {{U}}(9) {{/U}} . When the firms in an industry are making profits, they provide the investors in those firms with higher-than-average returns on their investments. Higher-than-average returns seldom go {{U}}(10) {{/U}}. In the long run they attract new investment and new firms. On the other hand, losses provide the {{U}}(11) {{/U}} for firms in an industry to leave it. Losses mean that returns to investors in the industry are below the average received by investors economy-wide; however, they do not necessarily {{U}}(12) {{/U}} that the net income of the firm is {{U}}(13) {{/U}}. It may or it may not be. But investors will want to withdraw their investments from the loss-incurring industry and {{U}}(14) {{/U}} in other industries where the returns will be greater. Where profits exist, returns on investment are above average. Where losses occur, returns are below average. So investment is {{U}}(15) {{/U}} being redirected from less valuable to more valuable uses.

单选题Tom: Thank you. Don"t trouble yourself. I"m not thirsty at all. Henry: ______ you wouldn"t like a cold beer, or a coke?

单选题A: I have no idea where to go in the Spring break. Got any suggestions? B: I"m not sure. ______

单选题We aim to ensure that all candidates are treated fairly and that they have equal ______ to employment opportunities. A. entrance B. entry C. access D. admission

单选题He was attending a meeting, ______ come to your birthday party then. A. unless he would have B. or he would C. but he did not D. or he would have

单选题Which of the following is the best topic for the passage?

单选题While still in its early stages, welfare reform has already been judged a great success in many states, at least in getting people off welfare. It's estimated that more than 2 million people have left the rolls since 1994. In the past four years, welfare rolls in Athens County have been cut in half. But 70 percent of the people who left in the past two years took jobs that paid less than $6 an hour. The result: The Athens County poverty rate still remains at more than 30 percent--twice the national average. For advocates (代言人) for the poor, that's an indication much more needs to be done. "More people are getting jobs, but it's not making their lives any better," says Kathy Lairn, a policy analyst at the Center on Budget and Policy Priorities in Washington. A center analysis of US Census data nationwide found that between 1995 and 1996, a greater percentage of single, female-headed households were earning money on their own, but that average income for these households actually went down. But for many, the fact that poor people are able to support themselves almost as well without government aid as they did with it is in itself a huge victory. "Welfare was a poison. It was a toxin (毒素) that was poisoning the family," says Robert Rector, a welfare-reform policy analyst. "The reform is changing the moral climate in low-income communities. It's beginning to rebuild the work ethic (道德观), which is much more important." Mr. Rector and others argued that once "the habit of dependency is cracked", then the country can make other policy changes aimed at improving living standards.

单选题As mainstream chip production technology shifts from one generation to the next every three to five years, plants with new technology can make more powerful chips at lower costs, ______ plants with outdated equipment, which often cost billions of dollars to build, will be marginalized by the maker. A. because B. even though C. while D. since

单选题Unexpectedly the light ______ and we were left in darkness.