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总部位于A省的某集团公司在B省有甲、乙、丙三家下属企业，为加强和规范应急管理工作，该集团公司委托某咨询公司编制应急救援预案，咨询公司通过调查、分析集团公司及下属企业的安全生产风险，完成了虚急救援预案的起草工作，提交给集团公司会议上进行评审。评审时，集团公司领导的意见是： (1)集团公司：和甲、乙、丙三家企业的应急救援预案在应急组织指挥结构上应保持一致。 (2)集团公司有自己的职工医院和消防队，应急救援时伤员救治要依靠职工医院，抢险力量队伍要依靠集团公司的消防队。 (3)周边居民安全疏散，应由集团公司通知地方政府有关部门，由地方政府组织实施。 (4)应急救援预案中因部分内容涉及集团公司商业秘密，应急救援预案不对企业全体员工和外界公开，只传达到各企业中层以上干部。 (5)应急救援预案要报A省安全生产监督管理部门备案。 近期，该集团公司完成了一套应急救援预案的演练计划，该计划设计的演练内容为： (1)打开液氨储罐阀门，将液氨划到储罐的围堰内。 (2)参演人员在规定的时间内关闭阀门，将围堰内的液氨进行安全处置。 (3)救出模拟中毒人员。 2008年3月6日，集团公司在甲企业进行了应急救援实战演练，演练地点设在甲企业的液氨储罐区，为保障参演人员、控制人员和观摩人员的安全，集团公司事先调来乙企业全部空气呼吸器、防毒面具、防爆性无线对讲机和检测仪器，同时调来集团公司消防队的所有水罐车、泡沫车和职工医院的救护车辆。演练从10点钟开始，按照事先制定的演练计划进行，10点20分氨气扩散到厂区外，由于演练前未组织周边群众撤离，扩散的氨气导致两名群众中毒，10点30分，抢救完中毒群众后，演练继续按计划进行。 根据以上场景。回答下列问题： 结合本案，简述事故应急救援的基本要求。
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DHCP协议的功能是 (58) 。在Linux中提供DHCP服务的程序是 (59) ；DHCP服务将主机的MAC地址和IP地址绑定在一起的方法是在 (60) 文件中添加：“host主机名hardware Ethernet xx.xx.xx.xx.xx.xx fixed-address 192.168.0.9”配置项；创建DHCP租用文件的命令是 (61) ；通过运行 (62) 命令可以设置在操作系统启动时自动运行 DHCP服务。
2 Large, multinational corporations may be the companies whose ups and downs seize headlines. But to a far greater extent than most Americans realize, the economy’s vitality depends on the fortunes of tiny shops and restaurants, neighborhood services and facto- ries. Small businesses, defined as those with fewer than 100 workers, now employ nearly 60 percent of the work force and are expected to generate half of all new jobs between now and the year 2000. Some 1.2 million small firms have opened their doors over the past six years of economic growth, and 1989 will see an additional 200,000 entrepreneurs striking off on their own. Too many of these pioneers, however, will blaze ahead unprepared. Idealists will overestimate the clamor for their products or fail to factor in the competition. Nearly every one will underestimate, often fatally, the capital that success requires. Midcareer execu tives, forced by a takeover or a restructuring to quit the corporation and find another way to support themselves, may savor the idea of being their own boss but may forget that en trepreneurs must also, at least for a while, be bookkeeper and receptionist, too. According to Small Business Administration data, 24 of every 100 businesses starting out today are likely to have disappeared in two years, and 27 more will have shut their doors four years from now. By 1995, more than 60 of those 100 start-ups will have folded. A new study of 3,000 small businesses, sponsored by American Express and the National Federation of Independent Business, suggests slightly better odds: Three years after start-up, 77 percent of the companies surveyed were still alive. Most credited their success in large part to having picked a business they already were comfortable in. Eighty percent had worked with the same product or service in their last jobs. Thinking through an enterprise before the launch is obviously critical. But many entre- preneurs forget that a firm’s health in its infancy may be little indication of how well it will age. You must tenderly monitor its pulse. In their zeal to expand, small business owners often ignore early warning signs of a stagnant market or of decaying profitability. They hopefully pour more and more money into the enterprise, preferring not to acknowledge eroding profit margins that mean the market for their ingenious service or product has evaporated, or that they must cut the payroll or vacate their lavish offices. Only when the financial well runs dry do they see the seriousness of the illness, and by then the patient is usually too far gone to save. Frequent checks of your firm’s vital signs will also guide you to a sensible rate of growth. To snatch opportunity, you must spot the signals that it is time to conquer new markets, add products or perhaps franchise your hot idea. Which of the following statements about small business is NOT true
Networks can be interconnected by different devices．In the physical layer，networks can be connected by (66) or Hubs, which just move the bits from one network to an identical net-work. One layer up we find bridgas and swiehes, which operate at data link layer. They can accept (67) , examine the MAC address, and forward the frames to a different network while doing minor protocol translation in the process. In the network layer, we have routers that can connect two netwoks. If two networks have (68) network layer, the router may be able to translate between the packet formats. In the transport layer we find transport gateway, which can interface between the two transport connections. Finally, in the application layer, application gateways translate message (69) . As an example, gateways between Internet e-mail and X.400 e-mail must (70) the e-mail message and change various header fields.
4 The crucial years of the Depression, as they are brought into historical focus, in creasingly emerge as the decisive decade for American art, if not for American culture in general. For it was during this decade that many of the conflicts which had blocked the pro gress of American art in the past came to a head and sometimes boiled over. Janus-faced, the thirties look backward, sometimes as far as the Renaissance; and at the same time for ward, as far as the present and beyond. It was the moment when artists, like Thomas Hart Benton, who wished to turn back the clock to regain the virtues of simpler times came into direct conflict with others, like Stuart Davis and Frank Lloyd Wright, who were ready to come to terms with the Machine Age and to deal with its consequences. America in the thirties was changing rapidly. In many areas the past was giving way to the present, although not without a struggle. A Predominantly rural and small town society was be ing replaced by the giant complexes of the big cities; power was becoming increasingly centralized in the federal government and in large corporations. Many Americans, deeply attached to the old way of life, felt disinherited. At the same time, as immigration decreased and the population became more homogeneous, the need arose in art and literature to commemorate the ethnic and regional differences that were fast disappearing. Thus, paradoxically, the conviction that art, at least, should serve some purpose or carry some message of moral uplift grew stronger as the Puritan ethos lost its contemporary reality. Often this elevating message was a sermon in favor of just those traditional American virtues, which were now threat ened with obsolescence in a changed social and political context. In this new context, the appeal of the paintings by the regionalists and the American Scene painters often lay in their ability to recreate an atmosphere that glorified the traditional American values—self-reliance tempered with good-neighborliness, independence modified by a sense of community, hard work rewarded by a sense of order and purpose. Given the actual temper of the times, these themes were strangely anachronistic, just as the rhetoric supporting political isola tionism was equally inappropriate in an international situation soon to involve America in a second world war. Such themes gained popularity because they filled a genome need for a comfortable collective fantasy of a God-fearing, white-picketfence America, which in retrospect took on the nostalgic appeal of a lost Golden Age. In this light, an autonomous art-for-art’s sake was viewed as a foreign invader liable to subvert the native American desire for a purposeful art. Abstract art was assigned the role of the villainous alien; realism was to personify the genuine American means of ex pression. The arguments drew favor in many camps: among the artists, because most were realists; among the politically oriented intellectuals, because abstract art was apoliti cal; and among museum officials, because they were surfeited with mediocre imitations of European modernism and were convinced that American art must develop its own distinct identity. To help along this road to self-definition, the museums were prepared to set up an artificial double standard, one for American art, and another for European art. In 1934, Ralph Flint wrote in Art News, "We have today in our midst a greater array of what may be called second-, third-, and fourth-string artists than any other country. Our big annuals are marvelous outpourings of intelligence and skill~ they have all the diversity and anima tion of a fine-ring circus. \ According to the passage, the best word to describe America in the 1930s would be______.
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