简述数字签名的特点。
《叔叔的故事》塑造了“叔叔”的形象，同时也塑造了年轻作家“（）”的形象。
Which of these is not used as a monitoring tool？（） [" CLI commands"," email alerts"," SNMP traps"," policy trace"]
Refer to the exhibit. Available public Internet sites are sometimes used for estimating performance. Which statement regarding their use for estimating VPN performance is correct?（） ["Throughput results are valid as a value from the Teleworker's home to the corporate site, regardless of the location of the public test server. ","Throughput results may not be valid due to the public server's location on the Internet and fluctuations based on the use of the public server. ","Throughput values are not affected by the choice of split tunneling or Internet access through the VPN. ","Throughput results are unrelated to the Teleworker PC configuration or current PC use."]
犯罪社会学与越轨社会学的区别。
在三相四线制中，当三相负载不平衡时，三相电压（），中线电流（）。
