单选题In our own galaxy, the Milky Way, there are perhaps 200 billion stars, a small part of them probably have planets on which life is feasible.

单选题Comparisons were drawn between the development of television in the 20th century and the diffusion of printing in the 15th and 16th centuries. Yet much had happened (91) . As was discussed before, it was not (92) the 19th century that the newspaper became the dominant pree-leetronie (93) , following in the wake of the pamphlet and the book and in the (94) of the periodical. It was during the same time that the communications revolution (95) up, beginning with transport, the railway, and leading (96) through the telegraph, the telephone, radio, and motion pictures (97) the 20th-eentury world of the motor ear and the airplane. Not everyone sees that process in (98) . It is important to do so. It is generally recognized, (99) , that the introduction of the computer in the early 20th century, (100) by the invention of the integrated circuit during the 1960s, radically changed the process, (101) its impact on the media was not immediately (102) . As time went by, computers became smaller and more powerful, and they became "personal" too, as well as (103) , with display becoming sharper and storage (104) increasing. They were thought of, like people, (105) generations, with the distance between generations much (106) It was within the computer age that the term" information society" began to be widely used to describe the (107) within which we now live. The communications revolution has (108) both work and leisure and how we think and feel both about place and time, but there have been (109) views about its economic, political, social and cultural implications. "Benefits" have been weighed (110) "harmful" outcomes. And generalizations have proved difficult.

单选题Agriculture today has had the luxury of being able to pollute and {{U}}alter{{/U}} the landscape first and worry about the consequences later.

单选题______ Roman mythology, god Jupiter was accepted as the most powerful one. A. Like B. For C. With D. In

单选题The problem of pollution as well as several other issues is going to be discussed when the Congress is in ______ again next spring.

单选题While Maggie, a white-collar worker, was at home after work, she ______ doing something to doing nothing. A. liked B. favored C. tended D. preferred

单选题The growth of their economy is ______ , not in reality. Many of their statistics are false. A. in figures B. in fact C. in the red D. in form

单选题Anyone can give examples of dreadful damages done by this industry, {{U}}which is apparently develop with the expense of{{/U}} the environment.

单选题The difference between a pearl and a cultured pearl is the nature of the ______.

单选题The policemen hurried to the spot of traffic accident where there was a large crowd of______. A．looker-on B．lookers-ons C．looker-ons D．lookers-on

单选题I would have finished my paper if it was at all possible, but I was fully occupied the whole of last week. A. had it been B. were it C. it had been D. it were

单选题The promised wage increase is being held back while it is examined by the government to see if it is greater than the law allows.

单选题Leading stress management experts say that life with stress would be dull and ______.

单选题{{B}}Passage Two{{/B}} Whales 鲸 Whales are aquatic mammals belonging to order CetaceA．A few species live in fresh water, but most species live in the seA．They have a streamlined shape and a powerful tail to drive them forwarD．With its two large horizontal fins or flukes, the tail produces the driving force by beating strongly up and down. Flippers at the front are used for steering and balance. The hind limbs of whales have completely disappeared, apart from a few small bones inside the body. Body hair has also disappeared, giving whales a smoother outline and less resistance to water.Instead of hair, whales are insulated by a thick layer of fat, or blubber, under the skin. The blubber may be as much as 61 cm thick on some parts of the body. Besides protecting the animal against the cold, the blubber is an important food reserve. Most of the best-known whales large creatures.For example, the blue whale reaches a length of more than 30 m.However, many whales, such as dolphins and porpoises, are small.Some are only 1.5 to 1.8 m long. Whales live entirely in water.Sometimes, whales are stranded on the shore.Although they are air-breathing animals, they soon die because their great weight keeps them from expanding (opening out) the chest cavity.They can breathe easily when afloat, because the water supports most of their weight. The bottle-nosed whale has been known to stay under water for about two hours.The sperm whale can dive down to depths of 500 fathoms.Such long and deep dives are unusual.Most dives last between 10 and 30 minutes.Whales have special mechanisms that help them to stay under water.When they breathe, they renew about nine-tenths of the air in their lungs.When human beings breathe in, only about one-fourth of the air is renewed.Whales therefore have a fairly large supply of fresh air to start with.They also have an additional oxygen supply in the muscles, where air is loosely held in combination with a pigment called myohaemoglobin.Another thing that helps whales hold their breath for long periods of time is their low sensitivity to carbon dioxide in the blood.(It is the carbon dioxide building up in human blood that affects the brain and makes the human being take another breath.) When a whale surfaces to renew its air supply, it needs only to push the top of its snout out of the water.This is because the nostril or blowhole is at the top of the heaD．The expelled air is forced out strongly to form the spout or blow. Living whales are divided into two groups—tooth whales and whalebone whales.Tooth whales, which include most species, generally have many conical teeth and eat mainly squids and fishes.The killer whale feeds on seals.One African river dolphin feeds mostly on plants.Other tooth whales include the narwhal and the sperm whale. Whalebone whales have no teeth.Their mouths contain huge comblike fringes of baleen or whalebone.This horny substance is usually black.All whalebone whales feed by straining small animals from the water.The mouth is filled with water and the water is then forced out through the fringes by the tongue.The animals caught in the baleen are swept into the stomach by the tongue. All whalebone whales are large animals, which are usually found in cold seas.They include the blue whales, the right whales, and the rorquals. The future of many of the larger kinds of whales is uncertain. Whalers have killed so many blue, bowhead, humpback, and right whales that those species are threatened with extinction. Overhunting has also greatly reduced the number of fin and sei whales.Also, if the human population does not stop increasing, people may have to compete with whales for food in the seA．Some nations have begun fishing for krill.Krill is the chief food of whales in Antarctic waters.

单选题If you continue to indulge in computer games like this, your future will be at stake.

单选题Although she didn't have to worry about money, she chose the______expensive among those fashionable coats.

单选题Were it not for the timely investment from the general public, our company would not be so thriving as it is. A．Be it not B．Should it not be C．It had not been D．Had it not been

单选题It describes a unique joint-venture in distance education and demonstrates the viable opportunities of global tele- education techniques in an exciting new market. A. practicable B. military C. difficult D. comprehensive

单选题Since writing home to their parents for money, they had lived ______ hope.

单选题I have been a little bit appalled by the {{U}}levity{{/U}} with which some of our politicians discuss this issue.