Your customer wants to build a network for a financial trading floor that has a requirement for multiple high-value transactions, which are also vital to the customer. What are the two most critical requirements? （）(Choose two.) no single point of failure。 trading database server location。 redundant application servers location。 deterministic response to all failures。 determine which protocol to use。
某证券投资组合有四种股票，经过研究四种股票在不同时期可能获得的收益率及不同的 市场时期可能出现的概率如下表，
计算
如果四只股票在证券投资组合中所占的权重分别为25%，30%，20%，25%，请计算此证券投资组合的预期收益率。
在一次设备运行而停部分保护进行工作时，应特别注意断开不经压板的（）线及与运行设备（）。
A cisco wcs version 4.0 has been installed on a server with a dual pentium 3.0 ghz processor，4 gb ram，and an 80 gb hard drive. a location appliance has been incorporated into the network and is being monitored by the cisco wcs. there are 3000 devices to be tracked but not all of them are being tracked on the cisco wcs. What can be done to correct the problem？（） add a new location appliance.。 add a new cisco wcs server dedicated to the location appliance.。 add 4 gb of ram to the cisco wcs.。 add a 120 gb hard drive to the cisco wcs.。
变动成本水平的表现形式一般是（）。 变动成本总额。 单位变动成本。 变动成本率。 约束性变动成本。
取保候审最长期限为（）
