程序集以（）文件或（）文件的形式出现。
What is a benefit of using subflows?（） ["decreases the amount of flows ","collects information about callers to agents ","creates a framework for CRS Server status reporting ","decreases latency through increased bandwidth on CRS Server ","provides more efficient management of flows that are called by multiple other flow"]
．对空气系统中的压力容器（风缸）进行水压试验时，其试验压力应为工作压力的1．25～1．5倍。
下列错误的是（） ["扑救含碳固体可燃物或可燃建筑构件的A类火灾选用B、C类干粉灭火器","扑救A类火灾选用水型、泡沫、磷酸铵盐干粉、卤代烷型灭火器","扑救C类火灾选用干粉、卤代烷、二氧化碳型灭火器","扑救水溶性B类火灾不得选用化学泡沫灭火器"]
Your network has a single domain with 1，000 client computers that run Windows Vista. You are planning a deployment of Windows 7. Your company has multiple departments. Only the sales department will use the existing target computers to run Windows 7. You have the following requirements：Migrate the user state for each user. Preserve the file system and existing applications for only the sales department computers. You need to recommend the deployment method that is appropriate for the environment. Which combination of deployment scenarios should you recommend？（） [" Use the Refresh Computer method for the sales department computers. Use the New Computer method for all other computers."," Use the Refresh Computer method for the sales department computers. Use the Replace Computer method for all other computers."," Use the Upgrade Computer method for the sales department computers. Use the Refresh Computer method for all other computers."," Use the Upgrade Computer method for the sales department computers. Use the Replace Computer method for all other computers."]
简述全局变量、局部变量、会话变量和应用程序变量之间的区别。
