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第五套人民币2005年版100元、50元纸币的冠字号码是（）。
Questions 11 to 15 are based on the following passage. Scratchy throats, stuffy noses and body aches all spell misery, but being able to tell if the cause is a cold or flu (流感) may make a difference in how long the misery lasts. The American Lung Association (ALA) has issued new guidelines on combating colds and the flu, and one of the keys is being able to quickly tell the two apart. That’s because the prescription drugs available for the flu need to be taken soon after the illness sets in. As for colds, the sooner a person starts taking over-the-counter remedy, the sooner relief will come. The common cold and the flu are both caused by viruses. More than 200 viruses can cause cold symptoms, while the flu is caused by three viruses—flu A, B and C. There is no cure for either illness, but the flu can be prevented by the flu vaccine (疫苗), which is, for most people, the best way to fight the flu, according to the ALA. But if the flu does strike, quick action can help. Although the flu and common cold have many similarities, there are some obvious signs to look for. Cold symptoms such as stuffy nose, runny nose and scratchy throat typically develop gradually, and adults and teens often do not get a fever. On the other hand, fever is one of the characteristic features of the flu for all ages. And in general, flu symptoms including fever and chills, sore throat and body aches come on suddenly and are more severe than cold symptoms. The ALA notes that it may be particularly difficult to tell when infants and preschool age children have the flu. It advises parents to call the doctor if their small children have flu-like symptoms. Both cold and flu symptoms can be eased with over-the-counter medications as well. However, children and teens with a cold or flu should not take aspirin for pain relief because of the risk of Reye syndrome (综合症)，a rare but serious condition of the liver and central nervous system. There is, of course, no vaccine for the common cold. But frequent hand washing and avoiding close contact with people who have colds can reduce the likelihood of catching one. According to the passage, to combat the flu effectively, （）
下列对加工贸易合同项下进口棉花、食糖、植物油、天然橡胶、羊毛的保税期限的规定中正确的是（）
全部轧账结束后，网点主管或指定轧账人员应按网点汇总填写（）。
（）提供社会保险服务，负责社会保险登记、个人权益记录、社会保障待遇支付等工作。
办理加拿大签证需提供照片（）。
小企业所购物资属于免税农业产品的，不涉及增值税的账务处理。
某350mm×350mm打入式混凝土预制方桩，混凝土为C30，f=14.3MPa，拟采用自由落锤方式打入，锤的直径为500mm，桩垫直径为400mm，其他条件见表4.9.1、图4.9.1。 锤的落距宜为（）。
在下列化合物中，乙醇的同分异构体是（ ）。
《安全生产违法行为行政处罚办法》的规定，设区的市级安全生产监管监察部门做出的（）等行政处罚，应当自作出行政处罚决定之日起10日内报设区的省级安全生产监督管理部门备案。
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