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用双绞线组网时，在不使用网桥的情况下，网络上可以连接的工作站多达（）个；
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A new study claiming to document a connection between violence on television and violence in real life is already coming under attack from academics. They say that the author is demanding action on his report before producing detailed findings to substantiate it.(47) Dr. William Belson told the British Association for the Advancement of Science in Birmingham last week that his research suggested that boys exposed to high levels of television violence were 50 percent more likely to commit acts of violence than boys who had not been exposed.His 110,000 pounds survey, paid for by CBS, the American television company, studied more than 15,000 London boys aged between 12 and 16. He closed his paper with a call for immediate action on his recommendations to reduce levels of TV violence and specific kinds of violence which he claimed were more damaging than others. His recommendations were enthusiastically endorsed by Mrs. Mary Whitehouse.Social scientists familiar with the field have a number of specific queries about Belson’s work. (48) They pointed out that a statistical technique invented by him and central to his research has been criticized by some academics in the past. Robin MrCorn, of the Mass Communication Research Centre at Leicester University, says," Self reporting—asking the subject to give his own account of the evidence is notoriously unreliable. Studies have put the possible error as high as 20 percent, and we don’t know what checks there were in this work. The fact that Belson paid the boys may’ have had an influence. Without the full data, it can’t be checked."McCorn adds:" His questions on the programmes go back 12 years. If the boys were aged between 13 and 16 it means the oldest was only four years old when the first programmes were broadcast. How reliable is the memory of a child that young likely to be on the programmes he watched Dr. Belson may have answers, but we just don’t know."(49) The Nelson affair highlights the difficulties faced by researchers into television violence-problems so severe that at least one British group has withdrawn from the field completely. "It’s impossible to do serious scientific work in his area now," says Robin McCron. "It has moved out of the academic world and it has been taken over by pressure groups and politics."Indeed, experience in television research in America reveals how treacherous this field has become. (50) Results of nervous projects there have been found, at worst, contradictory, at best, inconclusive. They pointed out that a statistical technique invented by him and central to his research has been criticized by some academics in the past.
Linux是目前较为流行的网络操作系统，如同Unix操作系统一样，它也可以通过手工编辑配置文件达到对系统进行配置的目的。在Linux网络配置文件中的几个较为重要的配置文件如下：(1) 用于存放本机主机名以及经常访问IP地址的主机名，在对IP进行域名解析时，可以设定为先访问该文件，再访问DNS，最后访问NIS。Linux下存在两个网络服务守候进程的配置文件。通过修改 (2) ，可以达到关闭或开放某种对应服务的目的。以FTP服务为例，将文件中“#FTP Stream TCP nowait root/usr/sbin/tcpd in.ftpd-1-a”前的“#”去掉就可以开启FTP服务。修改 (3) ，可对允许访问本机提供服务的主机范围进行限制。例如在文件中加入“in.ftpd:202.112.207.0/255.255.255.0”就可以允许202.112.207.0子网的用户主机访问本机提供的FTP服务。在Linux下进行DNS服务时， (4) 是控制解析器配置的最主要文件，规定了解析使用的服务，以及服务的顺序，比如可以通过在文件中加入“Order hosts，DNS，NIS”设定前面提到的域名解析顺序， (5) 是配置DNS服务器的主要文件，指定了本机使用的域名服务器以及多个服务器之间查找的顺序等。 3（）
A new study claiming to document a connection between violence on television and violence in real life is already coming under attack from academics. They say that the author is demanding action on his report before producing detailed findings to substantiate it.(47) Dr. William Belson told the British Association for the Advancement of Science in Birmingham last week that his research suggested that boys exposed to high levels of television violence were 50 percent more likely to commit acts of violence than boys who had not been exposed.His 110,000 pounds survey, paid for by CBS, the American television company, studied more than 15,000 London boys aged between 12 and 16. He closed his paper with a call for immediate action on his recommendations to reduce levels of TV violence and specific kinds of violence which he claimed were more damaging than others. His recommendations were enthusiastically endorsed by Mrs. Mary Whitehouse.Social scientists familiar with the field have a number of specific queries about Belson’s work. (48) They pointed out that a statistical technique invented by him and central to his research has been criticized by some academics in the past. Robin MrCorn, of the Mass Communication Research Centre at Leicester University, says," Self reporting—asking the subject to give his own account of the evidence is notoriously unreliable. Studies have put the possible error as high as 20 percent, and we don’t know what checks there were in this work. The fact that Belson paid the boys may’ have had an influence. Without the full data, it can’t be checked."McCorn adds:" His questions on the programmes go back 12 years. If the boys were aged between 13 and 16 it means the oldest was only four years old when the first programmes were broadcast. How reliable is the memory of a child that young likely to be on the programmes he watched Dr. Belson may have answers, but we just don’t know."(49) The Nelson affair highlights the difficulties faced by researchers into television violence-problems so severe that at least one British group has withdrawn from the field completely. "It’s impossible to do serious scientific work in his area now," says Robin McCron. "It has moved out of the academic world and it has been taken over by pressure groups and politics."Indeed, experience in television research in America reveals how treacherous this field has become. (50) Results of nervous projects there have been found, at worst, contradictory, at best, inconclusive. Results of nervous projects there have been found, at worst, contradictory, at best, inconclusive.
2002年6月4日，甲纺织厂与平安保险公司签订了企业财产保险合同。保险金额为人民币100万元，保险期为1年，即自2002年6月5日零时起至2003年6月4日24时止。2002年8月9日，甲纺织厂仓库失火，厂方领导积极组织进行扑救，但是由于火势太大，扑救工作困难，共花去人民币10万元。事故发生后，甲纺织厂立即向保险公司报了案，保险公司委托有关部门对保险事故进行调查，调查结论为：火灾系由于天气太热，纺织厂仓库底部货物突然自燃所引起，企业财产事故发生前价值人民币 200万元。此次调查共花去费用人民币5万元。请据此回答下列问题： 保险公司应向纺织厂支付的金额为：
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