【文章內(nèi)容簡介】 are called　　(C) to call　　(D) called　　15. The soybean contains vitamins, essential minerals, —— high percentage of protein.　　(A) a　　(B) and a　　(C) since a　　(D) of which a　　16. A gene is a biological unit of information who directs the activity of a cell or organism during its　　A B C D　　lifetime.　　17. The flowering of African American talent in literature, music, and art in the 192039。s in New York City　　A B C　　became to know as the Harlem Renaissance.　　D　　18. The symptoms of pneumonia, a lung infection, include high fever, chest pain, breathing difficult, and　　A B C D　　coughing.　　19. The rapid grow of Boston during the midnineteenth century coincided with a large influx of　　A B C　　European immigrants.　　D　　20. In 1908 Olive Campbell started writing down folk songs by rural people in the southern Appalachian　　A B C　　mountains near hers home.　　D　　 thirteen stripes of the United States flag represent the original thirteen states of the Union, which　　A B C　　they all were once colonies of Britain.　　D　　22. In 1860, more as 90 percent of the people of Indiana lived rural areas, with only a few cities having a　　A B C　　population exceeding 10,000.　　D　　 keeps the Moon in orbit around Earth and the planets other of the solar system in orbit　　A B C D　　around the Sun.　　24. Photograph was revolutionized in 1831 by the introduction of the collodion process for making glass　　A B C D　　negatives.　　25. After flax is washed, dry, beaten, and bed, fibers are obtained for use in making fabric.　　A B C D　　26. A fever is caused which blood cells release proteins called pyrogens, raising the body39。s temperature.　　A B C D　　27. Because of various giftgiving holidays, most stores clothing in the United Sates do almost as much　　A B　　business in November and December as they do in the other ten months bined.　　C D　　 United States National Labor Relations Board is authorized to investigation allegations of unfair　　A B　　labor practices on the part of either employers or employees.　　C D　　 Great Potato Famine in Ireland in the 184039。s caused an unprecedented numbers of people from　　A B C　　Ireland to immigrate to the United States.　　D　　 particles prising a given cloud are continually changing, as new ones are added while others　　A B　　are taking away by moving air.　　C D　　 parties in the United States help to coordinate the campaigns of their members and organizes A B C　　the statewide and national conventions that mark election years.　　D　　 lemur is an unusual animal belonging to the same order than monkey39。s and apes.　　A B C D　　 may be hard or soft, depending on the amount of water left into it and the character of　　A B C D　　the cuting.　　 carbonare lamp, a very bright electric lamp used for spotlights, consists of two carbon　　A B　　electrodes with a highcurrent are passing between it.　　C D　　35. At first the poems of . Cummings gained notoriety to their idiosyncratic punctuation and　　A B　　typography, but they have gradually been recognized for their lyric power as well.　　C D　　 mechanism of human thought and recall, a subject only partly understood by scientists, is　　A B C　　extraordinary plicated.　　D　　 the process of photosynthesis in green plants, light energy is captured and used　　A B　　to convert water, carbon dioxide, and minerals into oxygen and organic pounds.　　C D　　 globe artichoke was known as a delicacy at least 2,500 years ago, and records of its　　A B C　　cultivation date from fifteenth century.　　D　　39. Humans do not constitute the only species endowed with intelligence: the higher animals also　　A B C　　have considerably problemsolving abilities.　　D　　40. Many of species of milkweed are among the most dangerous of poisonous plants, while others　　A B C　　have little, if any, toxicity.　　D　　Questions 110　　In the early 180039。s, over 80 percent of the United States labor force was engaged in agriculture. Sophisticated technology and machinery were virtually nonexistent. People who lived in the cities and were not directly involved in trade often participated in small cottage industries making handcrafted goods. Others cured meats, silversmiths, candle　　5) or otherwise produced needed goods and modities. Blacksmiths, silversmiths, candle makers, and other artisans worked in their homes or barns, relying on help of family Perhaps no single phenomenon brought more widespread and lasting change to the United States society than the rise of industrialization. Industrial growth hinged on several　　10） economic factors. First, industry requires an abundance of natural resources, especially coal, iron ore, water, petroleum, and timberall readily available on the North American continent. Second, factories demand a large labor supply. Between the 187039。s and the First World War (19141918), approximately 23 million immigrants streamed to the United States, settled in cities, and went to work in factories and mines. They also helped　　15）build the vast network of canals and railroads that crisscrossed the continent and linked important trade centers essential to industrial growth. Factories also offered a reprieve from the backbreaking work and financial unpredictability associated with farming. Many adults, poor and disillusioned with farm life, were lured to the cities by promises of steady employment, regular paychecks,　　20) increased access to goods and services, and expanded social opportunities. Others were pushed there when new technologies made their labor cheap or expendable。 inventions such as steel plows and mechanized harvesters allowed one farmhand to perform work that previously had required several, thus making farming capitalintensive rather than laborintensive.　　25） The United States economy underwent a massive transition and the nature of work was permanently altered. Whereas cottage industries relied on a few highly skilled craft