Cheap protein substitutes from milk, eggs and meat________.

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问题 Cheap protein substitutes from milk, eggs and meat________.
In most corners of the world malnutrition is plainly a matter of outright insufficiency of food for 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 on children’s lives. Strategic vitamins and minerals may be lacking due to traditional diets which are nutritionally unbalanced. Here people continue their eating pattern year after year without knowledge of what their dietary habits are doing to themselves and to future generation. With a basic knowledge of nutritional needs and deficiencies, efforts would 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 meats, eggs, and milk are not within economic reach of large groups in the population. Efforts could also be expanded 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.

选项 A、may be obtained from vitamin and minerals
B、are being sought by scientists
C、can be gotten from soybeans
D、can be found in iodized salt

答案C

解析 正确理解句式复杂的句子意思是解题的关键。本题中原文句式复杂,全句是复合句,where引导的是状语从句。
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