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某人已被确诊为某病，而本人否认自己有病，此人角色行为的改变属于（）
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采用成型保温材料的主保温层厚度大于150mm时应分层。
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流行性乙型脑炎的流行特征是（）
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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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企业外部网的网络应用模式是（）
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国际工程投标报价的对比分析，首先分项统计计算书中的汇总数据，并计算其占标价的比例指标。对于一般房屋建筑工程的统计内容不包括（）
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透镜成像公式：1/像距=1/物距（）1/焦距
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在突发事件的传播中，大众传媒必须清醒地把握好突发事件的传播程度、视角、态度等等。媒介认识事件的视角、态度会极大地影响着人们的有关判断。
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新生儿心肺复苏操作正确的是（）
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个人可以委托其直系亲属代为办理年度总额内的购汇、结汇业务。代办时，应分别提供委托人和受托人的有效身份证件、委托人的授权书、直系亲属关系证明。