Immediately after the Civil War, however, the diet began【C1】______ . Rail t

游客2023-11-22 29

问题 Immediately after the Civil War, however, the diet began【C1】______ . Rail transportation increased the supply and【C2】______ the quality of the milk that reached urban centers;【C3】______ storage and refrigerator cars made【C4】 ______the【C5】______ consumption of fresh vegetables, fresh fruits, and fresh【C6】______ ; and commercial canning【C7】 ______the【C8】______ of appetizing and healthful foods. Subsequently food statistics indicated an increased consumption of 【C9】______ products, fresh fruit, fresh vegetables, sugar and syrups, coffee, tea, cocoa, and spices. Decreased consumption was shown【C10】______ meats, potatoes, and grain products.【C11】______By and large, the American diet continued to reflect a considerable reliance upon animal products,【C12】______ on grains, which meant that a【C13】______ large acreage was required to feed the American public. Whereas a grain and fish diet, such as in Japan, requires only a quarter of an acre high; yield cropland and no pasture per capitates. American diet requires about two and a half acres of cropland and ten acres of pasture per capita. Also it indicated a 【C14】______ toward the【C15】______ protective foods, toward those high【C16】______ vitamins and proteins. This change was greatly furthered by governmental food inspection(the Pure Food and Drug【C17】______ was passed in 1906), by the increasing use of【C18】______ refrigerators in the 1920’s and 1930’ s and of freezers for frozen food during recent【C19】______ .
In the years after World War I a food revolution【C20】______ that was reminiscent of the one that occurred after the Civil War. The output of the food; manufacturing industry quadrupled from 1900 to 1940. In that interval, as we have mentioned earlier, home canning gave way to commercial canning, and the labor of housekeeping was lightened. [br] 【C7】

选项 A、expand
B、extend
C、explore
D、exploit

答案 B

解析 extend 最符合题意。表示延伸

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