2. 外语
  3. Street sellers, particularly in developing countries, supply large amounts of food to people【C1】________ low incomes. This secto

Street sellers, particularly in developing countries, supply large amounts of food to people【C1】________ low incomes. This secto

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问题     Street sellers, particularly in developing countries, supply large amounts of food to people【C1】________ low incomes. This sector also employs some 6％-25％ of the work force, mainly women, in developing countries, and provides markets for agricultural and other【C2】________ . In many countries, however, the authorities are not willing to【C3】________ it as a formal sector of the food supply system. They may ignore it in food control programs or even try to put an end to it.
    There are two possible【C4】________ : pathogenic micro-organisms and hazardous chemicals. As far as micro-organisms are concerned, there is apparently no convincing evidence that street foods are more involved in the transformation of infection than foods obtained in, e.g. hotels. Studies in Egypt and elsewhere have found street foods to compare not【C5】________ with hotel foods in respect of contamination with micro-organisms—some street foods were found to be contaminated with pathogens, but so were foods from four- and five-star hotels in the same area.
    Hazardous【C6】________ have been found in street foods, and food exposed for sale on roadsides may become contaminated by lead from vehicle exhausts.
    Health dangers may【C7】________ with: purchase of raw material of poor quality; improper storage, processing, and cooking; limited piped drinking-water; lack of【C8】________ ; unsatisfactory waste-disposal facilities; and personal cleanliness. The authorities should take into account the potentials of different categories of food for transmitting diseases. Dry foodstuff, dried grains, and【C9】________ foods are less likely to transmit diseases than gravies, cooked rice, and low-acid milk, eggs, and meat products. Similarly foods which are thoroughly cooked and eaten at once are safer than【C10】________ food kept at high temperatures for several hours.
    A. on prep              B. produce         C. sugared       D. precooked
    E. with                 F. chemicals       G. product       H. ice
    I. consider             J. unfavorably     K. recognize     L. arise  
    M. refrigeration        N. contaminants    O. favorably  
【C7】
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答案L
解析 上下文题。根据词性，此处应当填入动词原形。根据上下文，此处讲述食物问题的起源，下面列举了几个可能产生问题的阶段。arise可用于表示问题的产生。
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