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膳食纤维的主要生理意义是
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Since the island has been barren for so many years, the natives must now ______ much of their food.
甲公司打算进军饮料产业，结合内部环境分析，甲公司打算另辟蹊径，主营功能型饮料，据此甲公司确定了战略群组，则甲公司在确定战略群组时考虑的最主要因素是______。
Directions: In this section, there is one passage followed by 6 statements. Go over the passage quickly. For questions 66-71, mark T (/for True) if the statement agrees with the information given in the passage; F (for False) if the statement contradicts with information given in the passage; NG (for Not Given) if the information is not given in the passage.Questions 66-71 are based on the following passage. Heat loss by sweating depends on the fact that when a liquid evaporates, it absorbs an enormous quantity of heat from its surroundings. Therefore, when 1 ml. of sweat evaporate, a great deal of heat is absorbed from the surface of the body in contact with it. This heat transfer occurs even if the environment is hotter than the body. Two factors affect the rate of evaporation of sweat, and therefore the effectiveness of sweating as a method of cooling the body. The first is the amount of movement of air surrounding the body. The second is the amount of water vapor in the air that surrounds the body. When air moves over the surface of water, the amount of evaporation is greatly increased. For this reason, sweat evaporates very rapidly on windy days, and the rate of heat loss by sweating is much more than on a still day. This accounts for the fact that hot still days are much less comfortable than hot windy days. In contrast, the sweat evaporates very rapidly on hot windy days, and cools the body quickly and effectively. The second factor is the amount of water vapor in the air--the humidity. When air is carrying the maximum amount of water vapor that it can hold, it is said to be 100% saturated with water vapor. The relative humidity of the air is said to be 100%. Under these conditions the air cannot carry any water, so no water can evaporate. When the relative humidity is high, therefore, sweat cannot evaporate. Instead, it forms large drops and runs off your skin without cooling you. When the air is very dry and carries no water at all, the relative humidity is said to be 0%. It is obvious that under these conditions, evaporation will be much more rapid. Therefore, sweating will be much more effective as a method of losing heat from the body. On a hot dry day, sweat evaporates as soon as it is formed, and you feel reasonably cool even though the temperature of your environment is very high. ______ On an extremely hot day, sweating to cool your body effectively will occur when the air is very hot and dry and carries no water at all.
Directions: There are two passages in this section with 10 questions. For each question, there are four choices marked A, B, C and D. You should decide on the best choice. Question 51-55 are based on the following passage. Our culture has caused most Americans to assume not only that our language is universal but that the gestures we use are understood by everyone. We do not realize that waving good-bye is the way to summon a person from the Philippines to one’s side, or that in Italy and some Latin-American countries, curling the finger to oneself is a sign of farewell. Those private citizens who sent packages to our troops occupying Germany after World War Ⅱ and marked them GIFT to escape duty payments did not bother to find out that "gift" means poison in German. Moreover, we like to think of ourselves as friendly, yet we prefer to be at least 3 feet or an arm’s length away from others. Latins and Middle Easterners like to come closer and touch, which makes Americans uncomfortable. Our linguistic and cultural blindness and the casualness with which we take notice of the developed tastes, gestures, customs and languages of other countries, are losing us friends, business and respect in the world. Even here in the United States, we make few concessions to the needs of foreign visitors. There are no information signs in four languages on our public buildings or monuments; we do not have multilingual guided tour. Very few restaurant menus have translations, and multilingual waiters, bank clerks and policemen are rare. Our transportation systems have maps in English only and often we ourselves have difficulty understanding them. When we go abroad, we tend to cluster in hotels and restaurants where English is spoken. The attitudes and information we pick up are conditioned by those natives--usually the richer--who speak English. Our business dealings, as well as the nation’s diplomacy, are conducted through interpreters. For many years, America and Americans could get by with cultural blindness and linguistic ignorance. After all, American was the most powerful country of the free world, the distributor of needed funds and goods. But all that is past. American dollars no longer buy all good things, and we are slowly beginning to realize that our proper role in the world is changing. A 1979 Harris poll reported that 55 percent of Americans want this country to play a more significant role in world affairs; we want to have a hand in the important decisions of the next century, even though it may not always be the upper land. The author’s intention in writing the article is to make Americans realize that ______.
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