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成本--效益分析可用哪些指标进行度量？
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成本--效益分析可用哪些指标进行度量？
时间：2021-09-01 16:39
关键词：
软件可行性研究
计算机科学技术
大学试题
工学
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<p> ⑴投资回收率：通常把建立系统若干年后能取得的收益折算成现在的价值和开发系统所需的费用进行比较得出投资回收率。<br> ⑵投资回收期：就是使累计的经济效益等于最初的投资费用所需的时间。<br> ⑶纯收入：整个生存周期之内的累计经济效益（折成现在值）与投资之差。</p>
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A campus emergency ______ occur at any time of the day or night, weekend, or holiday, with little or no warning.
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A cabinet or space containing the controls or valves for the fixed firefighting system must be（）.
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成本--效益分析可用哪些指标进行度量？
Mainly east 3 or 4 partly cloudy to overcast occasional rain（）slowly south moderate or good.
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（）any case or suspected case of quarantinable disease，or any case of eruptive disease or any death be discovered，the local quarantine officer must be notified immediately．
Should any case or suspected case of quarantinable disease，or any case of eruptive disease or any death be discovered，the local Quarantine Officer must be（）immediately.
Masters are（）solely responsible for all damages or accidents of whatever kind resulting from the navigating or handling of their vessels by day or by night.
If he is a common carrier，he is absolutely responsible to the owner of the goods carried （）any loss or damage to them unless caused by an Act of God or the Queen’s enemies，or the inherent vice in the goods themselves，or the negligence of the owner of the goods，or a general average sacrifice.
系统中雷达状态包括Unknown、Operational（or ON）、Failed（or OFF）、Detached。
Owners are to be responsible for loss of or damage to the goods or delay in delivery of the goods only in case the loss，damage or delay has been caused by the improper or negligent stowage of the goods．This means that（）.
The carrier is liable for loss of or damage to the goods or delay in delivery caused by fire，（）the claimant proves that the fire arose from fault or neglect on the part of the carrier，his servants or agents.
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