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女，28岁，偶尔于疼痛、恐惧时出现头晕、恶心、面色苍白等，几分钟后突然意识丧失，常伴血压下降，持续1分钟左右可自然苏醒，最可能的诊断为（）
机车柴油机启动前，应确认所有人员、工具已经撤离并高声呼唤。
GS1标识系统在供港蔬菜运作系统中导入标准化、国际化的GS1标识系统，为供应链中上下游参与方共同使用的公共信息建立了一套完整的编码与标识标准，确保了整个蔬菜供应链的跟踪溯源效率。
（）年成立于日本东京的创造社，是五四时期最具创新精神的文学社团。
《红楼梦》第八回脂砚斋评道“晴有林风”，清代徐瀛在《〈红楼梦〉论赞》中曾说“晴雯，黛玉之影子也”，说明黛玉和晴雯有许多相似之处。请比较这两个人物形象，对其主要相似之处加以简要概括。
医学伦理学原则不包括（）
请阅读 Passage l,完成第 21~25小题。 Passage1 In his book The Tipping Point, Malcolm Gladwell argues that "social epidemics" are driven in largepart by the actions of a tiny minority of special individuals, often calledinfluentials, who are unusually informed, persuasive, or well-connected. Theidea is intuitively compelling, but it doesn't explain how ideas actuallyspread. The supposed importance of influentials derives from a plausible-soundingbut largely untested theory called the "two-step flow ofcommunication": Information flows from the media to the influential andfrom them to everyone else. Marketers have embraced the two-step flow becauseit suggests that if they can just find and influence the influentials, those selectedpeople will do most of the work for them. The theory also seems to explain thesudden and unexpected popularity of certain looks, brands, or neighborhoods. Inmany such cases, a cursory search for causes finds that some small group ofpeople was wearing promoting, or developingwhatever it is before anyone else paid attention. Anecdotal evidence of thiskind fits nicely with the idea that only certain special people can drivetrends. In their recent work，however，some researchers have come up with the finding that influential havefar less impact on social epidemics than is generally supposed. In fact, theydon 't seem to be required of all.The researchers ' argument stems from a simple observation aboutsocial influence: With the exception of a few celebrities like OprahWinfrey-whose outsize presence is primarily a function of media, notinterpersonal, influence-even the most influential members of a populationsimply don't interact with that many others. Yet it is precisely these non-celebrityinfluentials who，according to the two-step-flow theory, are supposed to drive socialepidemics, by influencing their friends and colleagues directly. For a social epidemic to occur, however, eachperson so affected must then influence his or her own acquaintances，who must intum influence theirs, and so on; and just how many others pay attention to eachof these people has little to do with the initialinfluential. If people in the network just two degrees removed from the initialinfluential prove resistant. for example, the cascade of change won ' tpropagate very far or affect many people. Building on the basic truth aboutinterpersonal influence, the researchers studied the dynamics of social influenceby conducting thousands of computer simulations of populations, manipulating a numberof variables relating to people's ability to influence others and theirtendency to be influenced. They foundthat the principal requirement for what is called "global cascades"---the widespreadpropagation of influence through networks—is the presence not of a few influentials but ,rather, of a critical mass of easilyinfluenced people.What is the essential element in the dynamics of social influence?
目前中国人民银行个人住房按揭贷款的期限最长可达（）年
简述如何在活动中培养幼儿的想像能力。
在奶粉生产中，一般选用（）法干燥，具有良好的速溶性。
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