| Street sellers particularly in
developing countries, supply large amounts of food{{U}} (51)
{{/U}}people on 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 produce. In many countries{{U}} (52) {{/U}}, the
authorities are not willing to recognize it{{U}} (53) {{/U}}a formal
sector of the food supply system, they may ignore it in food control programs or
even try to put an end to{{U}} (54) {{/U}}. There are tow possible contaminants: pathogenic micro-organisms;{{U}} (55) {{/U}}hazardous chemicals: As{{U}} (56) {{/U}}as micro-organisms are concerned, there is apparently no convincing evidence that street foods are more involved in the transmission of infection{{U}} (57) A. for B. to C. by D. at [单项选择]腹部检查Courvoisier征阳性的疾病是（）
A. 急性胆囊炎 B. 胆囊癌 C. 急性胰腺炎 D. 胰头癌 E. 胆囊结石 [多项选择]下列对于虚痨的叙述正确的是（）
A. 又称为虚损 B. 为多种慢性衰弱征候的总称 C. 以脏腑气血阴阳亏损为主要表现 D. 治虚有三本，肺脾心也 E. 虚劳为五劳的总称 [判断题]扑救大型商场火灾，当火灾处于下降阶段时，要尽可能使用直流或喷雾射流，以减少水流对商品的浸渍。( )
A.正确 B.错误 [简答题]我国古代以“诗话”命名的第一部诗话是什么？
[简答题]就给定资料所反映的主要问题，用1200字左右的篇幅，自拟标题进行论述。要求中心明确，内容充实，论述深刻，有说服力。
[单选题]下列哪种疾病通常不会出现左上腹肿块
A.脾大 B.胰尾部肿瘤 C.胰头癌 D.结肠脾区肿瘤 E.胰体尾部囊肿 [单项选择]幽门螺杆菌
A. 革兰阳性细小杆菌 B. 脲酶试验阳性 C. 脲酶试验阴性 D. 触酶试验阴性 E. 触酶试验阳性 [单项选择]菜公司发行的股票每股盈余为5元，股利支付率为40%，股卡又收益率为8%，年终分红已支付完毕，目前投资者的预期收益率普遍为15%，则该只股票合理的价格应为（）元。
A. 20.55 B. 25.65 C. 19.61 D. 15.75 我来回答: 提交
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