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空气洁净技术常用（）将大气中微粒分离出去。
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下列送达不属于直接送达的是（）。
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京杭运河目前的通航省市，正确的是（）。
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外伤性血胸下列哪项表现可提示有继发感染（）
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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 author, knowing the cause of the misery will help（） We learn from the passage that （） According to the passage, to combat the flu effectively, （） Which of the following symptoms will distinguish the flu from a cold? （） If children have flu-like symptoms, their parents （）
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患者男，9岁，小学三年级学生。8岁时无明显原因出现咳嗽声，呈干咳状，当时正值冬季，家长认为系受凉导致的上呼吸道感染，因为没有发热和其他不适而未在意。大约2周以后突然叫出声音，老师认为是该同学故意在课堂上捣乱，曾严厉批评一次，批评后稍有好转。以后渐渐地口中发出狗叫声，并且挤眉弄眼、扮怪相、伸缩脖子，家长认为这孩子越来越不听话，不好好学习，而且在有意与家长和老师作对，在他扮怪相明显时打一顿，打一顿后能好1～2d，过后照旧。这样时好时坏持续到小学毕业。实验室检查：血清抗链“O”和血沉均正常，血常规及有关免疫学检查也正常。脑电图基本正常，颅脑CT及磁共振成像检查均正常。患儿的主要诊断是（）
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利用气胀式救生艇脱险后，夜间，利用（）发送（）信号。
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呼吸暂停
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慢性胆脂瘤型中耳炎，若局部引流受阻，或在急性发作后，出现周期性发作的畏寒、寒战、高热等症状应考虑是（）。
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在我国急性胰腺炎的最常见病因是（）。