基尔霍夫第二定律的内容是，电路中任一回路的各段电压的（）恒等于零。 代数和。 总和。 代数差。 和。
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根据β的含义，如果某种股票的系数等于1，那么（）。 其风险与整个股票市场的平均风险相同。 市场收益率不变，该股票的收益率也不变。 市场收益率上涨1%，该股票的收益率也上升1%。 市场收益率下降1%，该股票的收益率也下降1%。
公路工程机械台班单价有哪些费用组成？写出计算公式。
Your company has a main office and a branch office. The main office has a domain controller named DC1 that hosts a DNS primary zone. The branc office has a DNS server named SRV1 that hosts a DNS secondary Zone. All client computers are configured to use their local server for DNS resolution. You change the IP address of an existing server named SRV2 in the main office. You need to ensure that SRV1 reflects the change immediately. What should you do？（） Restart the DNS server service on DC1。 Run the dnscmd command by using the /zonerefresh option on DC1.。 Run the dnscmd command by using the /zonerefresh option on SRV1.。 Set the refresh interval to 10 minutes on the Start Of Authority （SOA） record.。
Your company has a branch office that is configured as a separate Active Directory site and has an Actrve Directory domain controller. The Active Directory site requires a local Global Catalog server to support a new application. You need to configure the domain controller as a Global Catalog server. Which tool should you use（）
