煤气加压站、混合站站房内主机之间以及主机与墙壁之间的净距离应不小于（）m。 0.8。 1.0。 1.3。 1.5。
外文正体的适用场合有（）。 表示量符号的字母，如V（体积）。 坐标系符号，如球坐标r，β，θ等。 所有的单位和词头符号如m，km，kg/m3，MPa等。
You are creating a view to join the Customers and Orders tables in a SQL Server 2005 database. You need to ensure that the view cannot be affected by modifications to underlying table schemas. You want to accomplish this goal by using the least possible amount of overhead. What should you do？（） Create CHECK constraints on the tables.。 Create a DDL trigger to roll back any changes to the tables if the changes affect the columns in the view.。 Create the view， specifying the WITH SCHEMABINDING option.。 Create the view， specifying the WITH CHECK option.。
You perform a security audit of a server named CRM1. You want to build a list of all DNS requests that are initiated by the server. You install the Microsoft Network Monitor 3.0 application on CRM1. You capture all local traffic on CRM1 for 24 hours. You save the capture file as data.cap. You find that the size of the file is more than 1 GB. You need to create a file named DNSdata.cap from the existing capture file that contains only DNS-related data. What should you do? （） Apply the display filter !DNS and save the displayed frames as a DNSdata.cap file.。 Apply the capture filter DNS and save the displayed frames as a DNSdata.cap file.。 Add a new alias named DNS to the aliases table and save the file as DNSdata.cap.。 Run the nmcap.exe /inputcapture data.cap /capture DNS /file DNSdata.cap command.。
根据现象数量方面的特点，统计研究的基本方法可以分为（）。 随机观察法。 抽签分组法。 综合指标法。 统计模型法。 统计推断法。
在Windows 7中你可以控制你的孩子什么时间可以登录到Windows 7。以下哪项最好的表述了从哪里配置这个选项？（）
