单选题What {{U}}dreadful{{/U}} weather we have these days!

单选题The meaning is still {{U}}obscure{{/U}}. A. transparent B. vague C. alien D. Significant

单选题The Book of Life So far, scientists have named about 1.8 million living species (特种), and that's just a small part of what probably exists on Earth. With so many plants, animals, and other creatures covering the planet, it can be tough to figure out what type of spider is moving up your leg or what kind of bird is flying by. A soon-to-be-launched Web site might help. An international team of researchers has announced the creation of a Web-based Encyclopedia (百科全书) of Life (EoL). The project aims to catalog every species on Earth in a single, easy-to-use reference guide. To get the encyclopedia started, the creators will use information from scientific databases (数据库) that already exist. And eventually, in special sections of the site, non-scientists with specialized (专门的) knowledge will get to join in. Bird-watchers, for example, will be able to input which birds they've seen and where. The technology for this kind of tool has only recently become available. As the EoL develops, you might find it useful for school projects. The site will feature special pa ges for kids who are studying ecosystems (生态系统) in their neighborhoods. To make sure the encyclopedia is accurate, scientists will review much of the information added to it. People who visit the site will be able to choose to leave out pages that haven't been reviewed. Another convenient feature of the EoL is that you'll be able to pick the level of detail you see to match your interests, age, and current knowledge. If you wanted to learn about bears for a science class report, for example, you could use the "novice " setting to get basic information about the animals. On the "expert" setting, on the other hand, you could get much more detailed information about the history, literature, and exploration of bears. It now takes years for scientists to collect all the data they need to describe and analyze species. The creators of the Encyclopedia of Life hope that their new tool will speed that process.

单选题He made a {{U}}considerable{{/U}} sum of money in real estate. A.large B.positive C.powerful D.realistic

单选题System of Criminal Trial How efficient is our system of criminal trial? Does it really do the basic job we ask of it—convicting the guilty and acquitting the innocent? It is often said that the British trail system is more like a game than a serious attempt to do justice. The lawyers on each side are so engrossed in playing hard to win, challenging each other and the judge on technical points, that the object of finding out the truth is almost forgotten. All the effort is concentrated on the big day, on the dramatic cross examination of the key witnesses in front of the jury. Critics like to compare our "adversarial" system (resembling two adversaries engaged in a contest) with the continental "inquisitorial" system, under which the judge plays a more important inquiring role. In early times, in the Middle Ages, the systems of trial across Europe were similar. At that time trial by "ordeal" —especially a religious event—was the main way of testing guilt or innocence. When this way eventually abandoned the two systems parted company. On the continent church-trained legal officials took over the function of both prosecuting and judging, while in England these were largely left to lay people, the justice of the peace and this meant that all the evidence had to be put to them orally. This historical accident dominates procedure even today, with all evidence being given in open court by word of mouth on the crucial day. On the other hand, in France for instance, all the evidence is written before the trial under supervision by an investigating judge. This exhaustive pretrial looks very undramatic; much of it is just a public checking of the written records already gathered. The Americans adopted the British system lock, stock and barrel and enshrined it in their constitution. But, while the basic features of our systems are common, there are now significant differences in the way serious cases are handled. First, because the U. S. A. has virtually no contempt of court laws to prevent pretrial publicity in the newspaper and on television, Americans lawyers are allowed to question jurors about knowledge and beliefs. In Britain this is virtually never allowed, and a random selection of juiors who are presumed not to be prejudiced are empanelled. Secondly, there is no separate profession of barrister in the United States, and both prosecution and defense lawyers who are to present cases in court prepare them themselves. They go out and visit the scene, track down and interview witnesses, and familiarize themselves personally with the background. In Britain it is the solicitor who prepares the case, and the barrister who appears in court is not even slowed to meet witness beforehand. British barristers also alternate doing both prosecution and defense work. Being kept distant from the preparation and regularly appearing for both sides, barristers are said to avoid becoming too personally involved, and can approach cases more dispassionately. American lawyers, however, often know their cases better. Reformers rightly want to learn from other countries"mistakes and successes. But what is clear is that justice systems, largely because they are the result of long historical growth, are peculiarly difficult to adapt piecemeal.

单选题Many economists have given in to the fatal lure of mathematics.

单选题These are their{{U}}Motives{{/U}} for doing it．

单选题It was difficult to see ships in the distance because of the fog .

单选题Anything to do with aeroplanes and flying fascinates him.

单选题She could not formulate her ideas in a few words.

单选题The student is collecting material for his science report.

单选题Please do not hesitate to call me if I can be of further assistance.A. contactB. seeC. helpD. touch

单选题Only those over 70 are eligible for the special payment.

单选题Mary felt {{U}}lonely{{/U}} after her husband died in a car accident.

单选题Inspecting a Used Car The scariest part of buying a used car is not being completely sure of what condition it's in. A car that's been in a major accident is always a bigger risk, but sellers often try to hide this information. Andrew Bleakley, evaluator-inspector, runs a mobile vehicle inspection service in Montreal. For about $ 80 he will perform a full, unbiased inspection on a used vehicle'. In his 10 years as a professional inspector, Bleakl'ey has seen a lot. He warns. "Watch out for dealer demonstration vehicles which are used, not new. They may have been in a collision." He adds that it is not uncommon in Ontario and Quebec especially for unscrupulous sellers to roll back the odometer or to even disengage it. Bleakiey has special tools to check for this. Bleakley always recommends hiring all independent technician to inspect the condition of a. used car before you buy it. The problem is finding someone qualified to do the inspection. Which he says generally doesn't mean just any mechanic. A thorough mechanical inspection includes checking the compression, all major systems, including the engine, electrical and charging systems, transmission and drive line, fluids, brakes, suspension, and steering. Essential, too, is all inspection of the car's body and finally a road test. There are, however, a few things everyone can do before buying a used car: Do a visual check of the car. Look at the right rear door hinges. If they are very worn, or the door doesn't close well, the car may have been used as a taxi. Holes in the roof could mean the car was used for deliveries. Check for oil leaks on the pavement. Note that leaks are not necessarily a significant problem— it depends on the cause. Don't assume that new looking brake and accelerator pedals mean the car hash't been driven much. Resellers know people check these details and can buy new pads for around $ 6. Copy down the vehicle' identification number (VIN). a 17-character combination of numbers and letters, from the vehicle's dashboard. In Ontado, ask the dealer or seller for the Used Vehicle Information Package. This gives details of previous owners, any outstanding liens on the car, and the fair market value of the vehicle. collision n. 碰撞；碰撞事故 odometer n.里程表 compression n. 压缩；压缩量 pedal n.踏脚 lien n. 扣押权 unscrupulous adj.不择手段的 disengage v. 松开；使脱离 transmission n.传输 suspension n.悬架 hinge n.铰链 dashboard n.仪表板

单选题The cylindrical shape of a cactus reduces moisture loss. A. lessens B. delays C. redistributes D. reverses

单选题You must shine your shoes. A．polish B．clear C．wash D．mend

单选题It"s a gorgeous day anyway.

单选题As in the field of space travel, so in undersea exploration new technologies continue to appear. They share a number of similarities with each other — as well as some important differences. Manned submersibles (潜水器), like spaceships, must maintain living conditions in an unnatural environment. But while a spaceship must simply be sealed against the vacuum of space, a submersible must be able to bear extreme pressure if it is not to break up in deep water. In exploring space, unmanned vehicles were employed before astronauts. In undersea exploration, on the other hand, men paved the way, only recently have unmanned remote-operated vehicles (ROVs) been put to use. One reason for this is that communicating with vehicles in orbit is much easier than talking to these underwater. A vacuum am ideal medium for radio communications, but underwater communications are limited to much slower sound waves. Thus, most undersea vehicles—particularly ROVs— operate at the end of long ropes. For a similar reason, knowing where you are undersea is much more difficult than in space. A spaceship's position can be located by following its radio signal, or by using telescopes and radar. For an undersea vehicle, however, a special network of sonar (声纳) must be laid out in advance on the ocean' floor in the area of a dive to locate the vehicle's position. Though undersea exploration is more challenging than outer space in a number of respects, it has a distinct advantage: Going to the ocean depths doesn't require the power necessary to escape Earth's gravity. Thus, it remains far less expensive.

单选题下面有3篇短文，每篇短文后有5道题。请根据短文内容，为每题定1个最佳选项。{{B}}第一篇{{/B}} How to Start a Small Business in the US People from other countries often take America as the "land of opportunity". Americans, too, believe that the country gives no end of chances to those who want to open their own businesses. Today, many Americans are still trying hard to become small business people, although only one out of two remains in operation after the first two years. Many people start their small businesses for the wrong reasons. They want to get away from the paper work of their present jobs, or to exchange the responsibility of their present jobs for free life styles. But more, not less, paper work and responsibility come with ownership of a small business. Thomas is the owner of the news magazine Mother Earth, which is now quite successful. He says that he had to work sixty hours without stopping when he was trying to bring out the first issue. Thomas had waited for years after he came up with the idea for Mother Earth. During that time, he collected as much information as he could about his business. He borrowed books from the library, talked to successful people in the field, and began planning carefully the amount of money and the kinds and numbers of supplies he would need. When he finally opened with a capital of $ 1,500 ,he set up his office in the kitchen and his printing press in the garage. Owing to his devotion(投入)to business, his talent, and his skill in management, Mother Earth now has a circulation(发行量) of 300,000. Not all small businesses are doing as fine as Mother Earth as 50% of the 450,000 that start in America every year fail. Still, 95% of businesses in the US can be called "small". Altogether these businesses amount to 40% of America's gross national product(国民生产总值).