单选题Some activists believe that because the health-care system has become increasing unresponsive to those it serves, individuals must {{U}}circumvent{{/U}} bureaucratic impediments in order to develop and promote new therapies. A. avoid B. utilize C. forsake D. frustrate

单选题We are well aware of the responsibilities that necessarily ______ to our office.

单选题Fruits are loaded with ______, vitamins and other nutrients, which can help to prevent genetic damage that can lead to the development of cancer.

单选题As serious as he is about the bullfight, he does not allow respect to ______ his sense of whimsy when painting it.

单选题Because excessively hunting has depleted many wildlife species, game preserves are being established.

单选题Lichens may grow on the bark of a tree in a steaming tropical rain forest, on the bricks of big city buildings, on rocks in hot springs, on wind-swept mountaintops, and in the driest desserts. In the arctic, they provide the principal food for caribou, and they are one of the few plants that grow in Antarctica. They are pioneers, appearing in barren rocky areas and starting the formation of soil in which mosses, then ferns, and then other plants can take root. Lichens are a partnership of two plants — fungi and algae. The lichen body is made up of a network of fungal strands. In the upper layers of these grow groups of algae. The two organisms live together to the benefit of both, a relationship known as symbiosis. The fungi provide support, absorb water, and shelter the tender algae from direct sunlight. The algae carry on photosynthesis and provide the fungi with food. The algae can live independently and are recognizable as a species that grows alone. The fungi, on the other hand, cannot live apart from their partners. They can be placed in known classes of fungi but are unlike any species that lives independently. So definite are the form, color, and characteristics of these double organisms that for hundreds of years, they were classified as one. More than 15,000 "species" were named. If these organisms are classified as separate species, it is difficult to fit them into the existing system of classification. But if they are classified separately, these species of fungi seem rather strange. Lichens are a splendid example of the difficulties faced by taxonomists in classifying species.

单选题I"m rather concerned how he will take in his school.

单选题Had I run out of gas, I ought to have called the garage.

单选题First launched in April this year, Net My Singapore also includes efforts that ______ training, development, and the exploration of new technologies based on. A. obliterate B. sequester C. encompass D. terminate

单选题Sea rise as a consequence of global warming would immediately threaten that large fraction of the globe living at sea level. Nearly one-third of all human beings live within 36 miles of a coastline. Most of the world"s great seaport cities would be 1 : New Orleans, Amsterdam, Shanghai, and Cairo. Some eountries—Maldives Islands in the Indian Ocean, islands in the Pacific—would be inundated. Heavily populated coastal areas such as in Bangladesh and Egypt, 2 large populations occupy low-lying areas, would suffer extreme 3 . Warmer oceans would spawn stronger hurricanes and typhoons, 4 in coastal flooding, possibly swamping valuable agricultural lands around the world. 5 water quality may result as 6 flooding which forces salt water into coastal irrigation and drinking water supplies, and irreplaceable, natural 7 could be flooded with ocean water, destroying forever many of the 8 plant and animal species living there. Food supplies and forests would be 9 affected. Changes in rainfall patterns would disrupt agriculture. Warmer temperatures would 10 grain-growing regions pole-wards. The warming would also increase and change the pest plants, such as weeds and the insects 11 the crops. Human health would also be affected. Warming could 12 tropical climate bringing with it yellow fever, malaria, and other diseases. Heat stress and heat mortality could rise. The harmful 13 of localized urban air pollution would very likely be more serious in warmer 14 . There will be some 15 from warming. New sea-lanes will open in the Arctic, longer growing seasons further north will 16 new agricultural lands, and warmer temperature will make some of today"s colder regions more 17 . But these benefits will be in individual areas. The natural systems— both plant and animal—will be less able than man to cope and 18 . Any change of temperature, rainfall, and sea level of the magnitude now 19 will be destructive to natural systems and living things and hence to man as well. The list of possible consequences of global warming suggests very clearly that we must do everything we can now to understand its causes and effects and to take all measures possible to prevent and adapt to potential and inevitable disruptions 20 by global warming.

单选题"If I worked not with my husband, I would have never met him," writes Jodster.

单选题You might include a couple of heady growth stocks ______ with your more pedestrian investments.

单选题By providing legal representation the American Civil Liberties Union works to defend citizens against {{U}}breaches{{/U}} of their civil rights. A. exercises B. perusals C. violations D. branches

单选题Giorgio, now fifteen, and Lucia, also in her teens, were reaching the ______ of their adolescence. A. crisis B. criterion C. causality D. credibility

单选题The middleman relieves the producer of ______.

单选题The goods are usually arranged according to their categories so that consumers can expeditiously find that they want.

单选题Buildings in the southeast of the UK are going to have to be constructed ______ those in Scotland if the report findings are correct. A. as B. like C. likely D. are like

单选题{{U}}He didn't buy the book because he was interested in poetry{{/U}}.

单选题There was no enmity between us, so we were able to reach an agreement on the sale of the property.

单选题Most young people today are, in the eyes of the older generation, selfish almost in all respects. A. self-assumed B. self-abandoned C. self-affected D. self-absorbed