题目内容
案例分析题试题四 阅读以下关于数据库架构设计的叙述，回答问题1至问题3。某软件公司欲开发一个社交网络系统，该系统能够接收多个不同种类客户端发送的信息，并将这些信息实时显示在每个客户端的页面上供客户阅读。该系统将为数以百万计的用户服务，因此，要求采用的数据库能够支持大量信息存储，能够满足并发读写要求，并要求随着数据规模的扩大，数据库系统要易于进行扩充。关于数据库架构的设计，王工和张工提出了两种模式：王工提出基于传统的关系型数据库模式，通过向上扩展(Scale-up)以满足数据库的可扩展性要求；李工提出利用新兴的NoSQL数据库模式，通过向外扩展(Scale-out)以满足数据库的可扩展性要求。项目组经过讨论，决定采用李工提出的设计方案。 【问题2】与传统的关系型数据库相比，NoSQL数据库所支持的典型数据存储类型有哪些？
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第三篇First AidFirst aid is emergency care for a victim of sudden illness or injury until more skillful medical treatment is available. It may save a life or improve certain vital signs including pulse, temperature, a clear airway（气道）,and breathing , in minor emergencies, first aid may prevent a victim’s condition form turning worse and provide relief from pain. First aid must be administered as quickly as possible. In the case of the critically injured, a few minutes can make the difference between complete recovery and loss of life.First-aid measures depend upon a victim’s needs and the provider’s level of knowledge and skill. Knowing what not to do in an emergency is as important as knowing what to do. Improperly moving a person with a neck injury, for example, can lead to permanent spinal(脊柱的) injury and paralysis(瘫痪).Despite the variety of injuries possible, several principles of first aid apply to all emergencies. The first step is to call for professional medical help. The victim, if conscious, should be reassured that medical aid has been requested, and asked for permission to provide any first aid. Next, assess, the scene, asking other people or the injured person’s family or friends about details of the injury or illness, any care that may have already been given ,and preexisting conditions such as diabetes(糖尿病) or heart trouble. The victim should be checked for a medical bracelet(手镯)or card that describes special medical conditions. Unless the accident scene becomes unsafe or the victim may suffer further injury, do not move the victim.First aid requires rapid assessment of victims to determine whether life-threatening conditions exist. One method for evaluating a victim’s condition is known by the acronym(首字母缩写词)ABC, which stands for:A---Airway: Is it open and clearB---Breathing: Is the person breathing Look, listen, and feel for breathing.C---Circulation: Is there a pulse Is the person bleeding externally Check skin color and temperature for additional indications of circulation problems. First aid may bring about all the following results EXCEPT（）
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