2. 外语
  3. Each USDA beef grade is a measure of a distinct level of quality. Because beef can vary so much in 【S1】______ , it takes eight g

Each USDA beef grade is a measure of a distinct level of quality. Because beef can vary so much in 【S1】______ , it takes eight g

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问题     Each USDA beef grade is a measure of a distinct level of quality. Because beef can vary so much in 【S1】______ , it takes eight grades to span the range. The three lowest grades are seldom sold as retail cuts since they go 【S2】______ into ground beef or into processed meat items such as hot dogs.
    The grade most widely sold is USDA Choice. It is 【S3】______ in great volume and retailers have found that this level of quality pleases most of their customers. Some stores, however, offer two grades so that their 【S4】______ may have a choice of quality and price.
    Standard grade beef has a high 【S5】______ of lean meat and very little fat. Because it comes from young 【S6】______ , beef of this grade is fairly tender; but because it lacks marbling, it is mild in flavor and is dry unless prepared with moist heat.
    Commercial grade beef is produced only from mature animals; the top four grades are restricted to young animals. It has abundant marbling and has the rich, full flavor characteristic of mature beef. 【S7】______ Commercial grade beef requires long, slow cooking with moist heat to make it 【S8】______ . When prepared in this manner, it can provide delicious and economical meat dishes.
   Regardless of their quality grade, some cuts of beef are naturally tender than others. Cuts from the less-used 【S9】______ along the back of the animal will always be more tender than those from the active muscles such as the shoulder, and round.
    Because the most tender cuts that make up only a small part of the beef carcass are in greatest 【S10】______ , they command a higher price than other cuts.

A) tender            B) however           C) quality            D) customers  
E) grade             F) animals           G) unless             H) economic
I) proportion        J) demand            K) range              L) muscles
M) mostly            N) produced          O) choice
【S4】
选项
答案D
解析 句子中的物主代词their指代的是retailers，因而，此处应是“零销商的顾客”。
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大学英语四级

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