题目内容
在楼群之间的网络连接，最佳的传输介质可选用 (28) 。
查看答案
搜索结果不匹配？点我反馈
更多问题
某商厦1993年10月竣工投入使用。商厦共6层，其中地下2层、地上4层，耐火等级为二级，占地面积3500m2，建筑面积8200m2，高20.4 m。商厦地下2层是家具商场和货物仓库。家具商场主要经营红木家具、沙发、席梦思床垫、办公桌椅等。地下1层主要经营副食品、百货等。地上1层主要经营小五金、小家电、文体用品、服装、日用品等；2层主要经营服装；3层仅有一些货架摊位；4层东侧和南侧为办公区，北侧有一间会议室，西侧为某歌舞厅KTV包间，中部为某歌舞厅大厅。火灾当晚歌舞厅内有400余人。 2010年12月25日20时许，员工王某在地下1层中部进行焊接操作时，电焊火花顺着钢板上的孔洞掉落到地下2层中部，引起楼梯上的沙发塑料泡沫等物品起火。王某等人发现起火后，用室内消火栓通过孔洞向1层浇水扑救，但火势没有得到有效控制，反而越来越大，他就同其他职工一起逃离现场。 21时35分公安消防支队接到报警后，相继调集31辆消防车、200多名消防人员赶赴火场，随后又请调公安、武警等单位协同作战。由于这次火灾起火部位在该商厦的最底层，东北和西北两个楼梯间上下贯通，着火后形成烟囱效应，在风压的作用下，大量有毒烟雾很快扩散到整个大楼。火灾发生后，该商厦有关人员盲目采取了全楼断电措施，楼内又未设置消防应急照明灯，致使全楼漆黑一片，给扑救火灾和人员营救带来了极大的困难。公安消防部队在火灾扑救中，共营救遇险人员106人。22时50分将火控制，26日0时37分将火彻底扑灭。这起火灾事故造成309人死亡、7人受伤，直接财产损失275．3万元。 根据以上场景，回答下列问题 下列对疏散指示标志设置要求，描述正确的有( )。
多路复用(Multiplexing，也称多路复接)是通信中常用的技术，在不同的应用场合中可以采用不同的多路复用方式，如： (17) ：光缆就是采用这种方式； (18) ：GSM通信中采用此方式； (19) ：用此方式60路话音可复用一个超群(Supergroup)； (20) ：用于移动电话射频通信中； (21) ：光纤通信时用此方式在一根光缆中可同时传输多路信号。
In recent speeches at Republican fundraisers, President Bush has taken to criticizing the press for baring government secrets. The outgoing secretary of the Treasury, John Snow, in what may have been his last official act, wrote to The New York Times that in exposing the monitoring of bank transfers, it had undermined a successful counterterrorism program. A house resolution, passed by a party line vote, called on the media to safeguard classified programs. The government has discovered what governments have discovered before, that an undercurrent of hostility towards the news media runs through the country and that there could be political advantage in campaigning against the press in general. The champion press hater, of course, was President Nixon, who told his staff that the press is the enemy, and he proceeded to declare his own private war against the media. In 1969, he had a speech written by speechwriter Pat Buchanan denouncing the media as a "tiny and closed fraternity of privileged men". And he gave it to Vice President Spiro Agnew to deliver. That speech is best remembered today for the line contributed by another speechwriter, William Safire, about "nattering nabobs of negativism". It is not clear that the public hates the press as much as officialdom would like to think. A recent Pew Research report found that public attitudes towards the press have been on a downward track for years. Growing numbers of people questioned the news media’s patriotism and fairness. And yet most Americans continue to say they like mainstream news outlets. And so, as The Christian Science Monitor headlined the other day: "Amid war on terror, a war with the press." You would not expect that I, as a journalist, would exhibit total neutrality in such a war. And so let me quote Justice Potter Stewart in his opinion in the Pentagon Papers ease in 1971: "In the absence of governmental checks and balances present in other areas of our national life, the only effective restraint upon executive policy and power in the area of national defense and international affairs may lie in an enlightened citizenry... Without an informed and free press, there cannot be an enlightened people;" That remains true, even when Mr. Bush proclaims a state of war with the terrorists. We can infer from the passage that ______.
按照检测数据的来源可将入侵检测系统(IDS)分为 (60) 。
微信支付 
支付宝支付