课程列表 - 笔果题库

Koalas look like teddy bears,21______ they are not bears at all. They are really animals called marsupials.These animals carry their young in pouches, like kangaroos 22______.Koalas live in the forests of Australia. They spend most of their lives in eucalyptus trees. They 23______ never come down even for a drink of water. In fact, their names means “no drink.” The koalas have a 24______ of knowing which trees they can feed on safely. They eat each leaf the same way.25______, they bite the leaf off the stem and then they chew it from base to 26______.When a koala is born, it is less than an inch long. The baby crawls into the mother’s 27______ right away and stays there for six months. After that, the baby rides piggyback or hangs on 28______ the mother’s front paws and legs. Young koalas stay with their mothers for at least a year.The koala is a strong climber. Its paws end with sharp claws,29______ he can get a good grip on tree branches. Koalas sleep in the eucalyptus trees on most of the day and eat at night. Koalas may live alone or in small 30______. Males sometimes use their sharp claws as weapons. Most of the time, koala families live together peacefully.29.

Passage 1The Internet will play a central role in conducting international trade beyond the year 2000. The World Trade Centers Association (WTCA) recently announced a plan to assist developing countries develop a capacity for e-commerce and e-business. The spin off from this decision can pay huge dividends to offshore companies that position themselves on-line right now to supply goods and services to the coming global Internet trading market.E-business will help you get set up and operate with a minimum of effort and at reasonable prices.E-business Incorporated works with international companies to set up a web-office, or CyberSuite as its own domain accessible over the Internet via its own domain name or from the e-business Cyberspace Station.If you are a supplier, your CyberSuite would have a showroom where visitors — especially wholesale importers and distributors — can examine images, drawings or listings of what you have to offer. If you are a buyer, your web-office can include a notice board listing products or services or agreements you are looking for and a bidding gallery where suppliers can post bids and link you to their sites to examine products. Trading partners can make purchases, send invoices, hold business meetings, track shipments, and work out potential trade agreements within the E-business Cyberspace Station. E-business seminars and conferences will introduce new potential trade partners to each other.Orders placed on the site are sent immediately to manufacturers and any suppliers integrated into the trade process. For example, established trading partners might include an importer ordering large shipments from a manufacturer and suppliers of parts or raw materials in other countries. By electronically notifying the whole trade net at the same time, each partner is able to trim supply and demand to “just in time” delivery of goods or services. The savings of doing business this way can be substantial — even without the tax advantages.31.E-business Incorporated can help a company to ______.

Passage 2Music which is original is individual and personal. That is to say, it can be identified as belonging to a particular composer. It has particular qualities, or a style, which are not copied from another. If you can recognize the style of a composer, you will probably be able to tell that a certain composition belongs to him or her even though you have never heard it before. A composer organizes his melodies (旋律) and rhythms and combines sounds to create harmony. He may be capable of thinking up very good, original tunes, yet if tunes are poorly organized, the final result will not be to standard.Good music expresses feelings in a way that is suitable to those feelings. There may be joy, sorrow, fear, love, anger, or whatever. Bad music, on the other hand, may confuse unrelated feelings, it may not express any important feeling at all, or it may exaggerate some feelings and make them vulgar, that is, cheap and ugly.Good music will stand the test of time. It will not go out of fashion but will continue to be enjoyed and respected long after it is first introduced. It will gain a kind of permanent status while bad music will disappear and be forgotten quickly. In pop music, where the general rule seems to be “the newer the better”, the test of time is the hardest test of all to pass.34.A piece of original music ______.

Passage 3For some time past it has been widely accepted that babies - and other creatures - learn to do things because certain acts lead to “rewards”; and there is no reason to doubt that this is true. But it used also to be widely believed that effective reward, at least in the early stages, had to be directly related to such basic physiological (生理的) “drives” as thirst or hunger. In other words, a baby would learn if he got food or drink of some sort of physical comfort, not otherwise.It is now clear that this is not so. Babies will learn to behave in ways that produce results in the world with no reward except the successful outcome.Papousek began his studies by using milk in the normal way to “reward” the babies and so teach them to carry out some simple movements, such as turning the head to one side or the other. Then he noticed that a baby who had had enough to drink would refuse the milk but would still go on making the learned response with clear signs of pleasure. So he began to study the children’s responses in situations where no milk was provided. He quickly found that children as young as four months would learn to turn their heads to right or left if the movement “switched on” a display of lights - and indeed that they were capable of learning quite complex turns to bring about this result, for instance, two left or two right, or even to make as many three turns to one side.Papousek’s light display was placed directly in front of the babies and he made the interesting observation that sometimes they would not turn back to watch the lights closely although they would “smile and bubble” when the display came on. Papousek concluded that it was not primarily the sight of the lights which pleased them, it was the success they were achieving in solving the problem, in mastering the skill, and that there exists a fundamental human urge to make sense of the world and bring it under intentional control.37.According to the author, babies learn to do things which ______.

Passage 3For some time past it has been widely accepted that babies - and other creatures - learn to do things because certain acts lead to “rewards”; and there is no reason to doubt that this is true. But it used also to be widely believed that effective reward, at least in the early stages, had to be directly related to such basic physiological (生理的) “drives” as thirst or hunger. In other words, a baby would learn if he got food or drink of some sort of physical comfort, not otherwise.It is now clear that this is not so. Babies will learn to behave in ways that produce results in the world with no reward except the successful outcome.Papousek began his studies by using milk in the normal way to “reward” the babies and so teach them to carry out some simple movements, such as turning the head to one side or the other. Then he noticed that a baby who had had enough to drink would refuse the milk but would still go on making the learned response with clear signs of pleasure. So he began to study the children’s responses in situations where no milk was provided. He quickly found that children as young as four months would learn to turn their heads to right or left if the movement “switched on” a display of lights - and indeed that they were capable of learning quite complex turns to bring about this result, for instance, two left or two right, or even to make as many three turns to one side.Papousek’s light display was placed directly in front of the babies and he made the interesting observation that sometimes they would not turn back to watch the lights closely although they would “smile and bubble” when the display came on. Papousek concluded that it was not primarily the sight of the lights which pleased them, it was the success they were achieving in solving the problem, in mastering the skill, and that there exists a fundamental human urge to make sense of the world and bring it under intentional control.38.Papousek noticed in his studies that a baby ______.