考研英语作文经典范文洪恩英语在线
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考研英语作文：British Columbia
British Columbia is the third largest Canadian provinces, both in area and population. It is nearly 1.5 times as large as Texas, and extends 800 miles(1,280km) north from the United States border. It includes Canadas entire west coast and the islands just off the coast.
Most of British Columbia is mountainous, with long rugged ranges running north and south. Even the coastal islands are the remains of a mountain range that existed thousands of years ago. During the last Ice Age, this range was scoured by glaciers until most of it was beneath the a. Its peaks now show as islands scattered along the coast.
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The southwestern coastal region has a humid mild marine climate. Sea winds that blow inl
hopkinsand from the west are warmed by a current of warm water that flows through the Pacific Ocean. As a result, winter temperatures average above freezing and summers are mild. The warm western winds also carry moisture from the ocean.
Inland from the coast, the winds from the Pacific meet the mountain barriers of the coastal ranges and the Rocky Mountains. As they ri to cross the mountains, the winds are cooled, and their moisture begins to fall as rain. On some of the western slopes almost 200 inches (500cm) of rain fall each year.
More than half of British Columbia is heavily forested. On mountain slopes that receive plentiful rainfall, huge Douglas firs ri in towering columns. The forest giants often grow to be as much as 300 feet(90m) tall, with diameters up to 10 feet(3m). More lumber is produced from the trees than from any other kind of tree in North America. Hemlock, red cedar, and balsam fir are among the other trees found in British Columbia.
考研英语作文：The origin of Refrigerators
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By the mid-nineteenth century, the term "icebox" had entered the American language, but ice was still only beginning to affect the diet of ordinary citizens in the United States. The ice trade grew with the growth of cities. Ice was ud in hotels, taverns, and hospitals, and by some forward-looking city dealers in fresh meat, fresh fish, and butter. After the Civil War( 1861-1865),as ice was ud to refrigerate freight cars, it also came into houhold u. Even before 1880,half of the ice sold in New York, Philadelphia, and Baltimore, and one-third of that sold in Boston and Chicago, went to families for their own u. This had become possible becau a new houhold convenience, the icebox, a precursor of the modern refrigerator, had been invented.
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Making an efficient icebox was not as easy as we might now suppo. In the early nineteenth century, the knowledge of the physics of heat, which was esntial to a science of refrigeration, was rudimentary. The commonn notion that the best icebox was one that prevented the ice from melting was of cour mistaken, for it was the melting of the ice that performed the cooling. Nevertheless, early efforts to economize ice included wrapping up the ice in blankets, which kept the ice from doing its job. Not until n
ear the end of the nineteenth century did inventors achieve the delicate balance of insulation and circulation needed for an efficient icebox.
But as early as 1803, and ingenious Maryland farmer, Thomas Moore, had been on the right track. He owned a farm about twenty miles outside the city of Washington, for which the village of Georgetown was the market center. When he ud an icebox of his own design to transport his butter to market, he found that customers would pass up the rapidly melting stuff in the tubs of his competitors to pay a premium price for his butter, still fresh and hard in neat, one-pound bricks. One advantage of his icebox, Moore explained, was that farmers would no longer have to travel to market at night in order to keep their produce cool.
考研英语作文：Plankton浮游生物软件设计师证书
Scattered through the as of the world are billions of tons of small plants and animals called plankton. Most of the plants and animals are too small for the human eye to e. They drift about lazily with the currents, providing a basic food for many larger animals.
我的英文单词 Plankton has been described as the equivalent of the grass that grow on the dry land continents, and the comparison is an appropriate one. In potential food value, however, plankton far outweighs that of the land grass. One scientist has estimated that while grass of the world produce about 49 billion tons of valuable carbohydrates each year, the as plankton generates more than twice as much.
Despite its enormous food potential, little effect was made until recently to farm plankton as we farm grass on land. Now marine scientists have at last begun to study this possibility, especially as the as resources loom even more important as a means of feeding an expanding world population.
No one yet has riously suggested that " plankton-burgers" may soon become popular around the world. As a possible farmed supplementary food source, however, plankton is gaining considerable interest among marine scientists.
One type of plankton that ems to have great harvest possibilities is a tiny shrimp-like creature called krill. Growing to two or three inches long, krill provides the major food for t
he great blue whale, the largest animal to ever inhabit the Earth. Realizing that this whale may grow to 100 feet and weigh 150 tons at maturity, it is not surprising that each one devours more than one ton of krill daily.
慷慨大方考研英语作文：Botany
Botany, the study of plants, occupies a peculiar position in the history of human knowledge. For many thousands of years it was the one field of awareness about which humans had anything more than the vaguest of insights. It is impossible to know today just what our Stone Age ancestors knew about plants, but form what we can obrve of pre-industrial societies that still exist a detailed learning of plants and their properties must be extremely ancient. This is logical. Plants are the basis of the food pyramid for all living things even for other plants. They have always been enormously important to the welfare of people not only for food, but also for clothing, weapons, tools, dyes, medicines, shelter, and a great many other purpos. Tribes living today in the jungles of the Amazon recognize literally hundreds of plants and know many properties of each. To the
m, botany, as such, has no name and is probably not even recognized as a special branch of " knowledge" at all.
