简述归因理论。
阐述信息资源加工的原则和作用。
基于Windows的Web服务器端组件为（）。 ["Apache","IIS","CuteFtp","Flashfx"]
不同管径的管节相连时，两管径相差大于小管管径的（）时，可用渐缩管连接。渐缩管的长度不应小于两管径差值的2倍，且不应小于200mm。 ["A.8 ","B.10 ","C.12 ","D.15"]
Ten users at your office run an accounting application on their Windows NT Workstation 4.0 computers. The application stores its data in a shared network folder named Accdata on a Windows 2000 Server computer named Server1. You upgrade all 10 computers to Windows 2000Professional and verify that all applications are compatible with Windows 2000. After the upgrade，some users report that they are receiving intermittent data-corruption error messages. They are also receiving data file-version mismatch error messages. When these errors occur， your only method of recovery is to restore the entire contents of the Accdata folder from a known good backup copy. You need to prevent these errors from occurring in the future. What should you do？（） ["Configure Accdata folder to allow a maximum of one user.","Configure the Accdata folder to disable client caching.","Create a group policy that removes the Bypass Traverse Checking user right on server1.","Create a group policy that increases the amount of idle time required before a session disconnects on server1."]
莱公司计划投资某一项目，原始投资额为200万元，全部在建设起点一次投入，并于当年完工投产。投产后每年增加销售收人90万元，增加付现成本21万元。该项目固定资产预计使用10年，按直线法提取折旧，预计残值为10万元。该公司拟发行面值为1000元，票面年利率为15％，期限为l0年的债券1600张，债券的筹资费率为1％，剩余资金以发行优先股股票方式筹集，固定股利率为19．4％，筹资费率3％，假设市场利率为15％，所得税税率为34％。债券成本率、优先股成本率和项目综合成本率
