单选题
In most corners of the world malnutrition is plainly a matter of outright insufficiency of food for the population--where the majority of the people do not obtain enough food calories to meet minimal needs for support of physical work and for maintenance of health. Elsewhere the problem may be not one of insufficient, calories but of lack of specific nutrients essential for health.
In Latin America, as in other places, the dread protein deficiency disease kwashiorkor is taking its heavy toll of children's lives. Strategic vitamins and minerals may be lacking due to traditional diets which are nutritionally imbalanced. Here people continue their eating pattern year after year without knowledge of that their dietary habits are doing to themselves and to future generations.
With a basic knowledge of nutritional needs and deficiencies, efforts could be directed to finding food substitutes which could meet these needs. Mixtures of vegetable proteins, like soybeans and peanuts, could provide an abundance of cheap, useful protein where meat, eggs, and milk are not within economic reach of large groups in the population. Efforts could also be expended on increasing the agricultural productivity in specific regions; where large areas are given over to relatively inefficient use as grazing land, the intensive production of vegetable protein crops could bring remedial nutrition to an undernourished population. Elsewhere, enrichment with specific vitamins and minerals of traditional staple foods that are deficient in essential nutritive factors could wipe out disabling deficiency diseases, like beriberi or pellagra, almost overnight. Similarly, addition of minute amounts of inexpensive iodine to salt could benefit large areas where endemic goiter has been accepted as an integral part of life for generations.
单选题 Cheap protein substitutes for milk, eggs, and meat ______.
【正确答案】 C
【答案解析】可以从大豆中获得廉价的蛋白质,代替牛奶、鸡蛋和肉类。根据第三段第二句,如果有许多人群负担不起肉类、鸡蛋和牛奶,蔬菜蛋白质的混合物,如大豆和花生能提供大量廉价而有用的蛋白质。
单选题 The peanut is ______.
【正确答案】 D
【答案解析】花生是蛋白质的一种来源。见注释16。
单选题 The major cause of malnutrition in the world is lack of ______.
【正确答案】 D
【答案解析】全世界营养不良的主要原因是缺乏食物。根据第一段第一句,在全世界的大部分地区,营养不良显然是人类食品不足带来的问题。
单选题 Kwashiorkor ______.
【正确答案】 A
【答案解析】恶性营养不良对儿童尤其有害。根据第二段第一句,正如在其他地区那样,目前,拉丁美洲可怕的蛋白质缺乏症夸希奥科病夺去大量儿童的生命。
单选题 The title that best expresses the main idea of this passage is ______.
【正确答案】 D
【答案解析】表达这篇短文大意的最佳标题是:与营养不良作斗争。全文都在讨论与营养不良作斗争的方法。A,B和C都太泛。