The prevailing distributed computing model of the current era is called ctiem servar computing.A（作答此空）is a solution in which the presentation, presentation logic,application logic,data manipulation and data layers are distributed between client PCs and one or more servers. A ( ) is a personal computer that does not have to be very powerful in terms of processor speed and memory because it only presents the interface to the user. A（ ）is a personal computer,notebook.computer,or workstation that is typically more powerful in terms of processor speed,memory,and storage capacity. A（ ）hosts one or more shamad database but also executes all database commands and services for information systems.A (n)（ ）hosts Internet or intranet web sites,it communicates with clients by returning to them documents and data.
现在主流的分布式计算是客户/服务器计算模式。客户/服务器系统是一种解决方案，其中表示层、表示逻辑层、应用逻辑、数据操作、数据层分布在客户的PC端与一个或多个服务器端之间。瘦客户端指的是个人电脑在处理速度、内存方面无须很强大，因为它仅仅是展示接口给用户。胖客户端是指个人电脑、笔记本、工作站在处理速度、内存、存储容量方面都很强大的一类电脑。数据库服务器控制一个或多个共享数据库，同时也执行所有数据库命令以及服务于信息系统。web服务器控制互联网、信息平台，与客户端通信，返回给客户端文件与数据。
Advancements in （ ）have contributed to the growth of the automotive industry through the creation and evolution of self-driving vehicles.
In project human resource management , （ ）is not a source of power for the project manager.
At the project establishment stage , the feasibility study mainly includes techinical feasibility analysis , （ ）, operation environment feasibility analysis and other aspects of feasibility analysis.
（ ）is a grid that shows the project resources assigned to each work package.
Xinhua News Agency reported in January 2022，Chian will further promote the developmet of a digital economy during the 14th Five-Year Plan eriod（2021-2025）. The plan also emphasized industrial （ ）transformation.
某公司投资一个使用寿命为5年的项目，第一年年初投入1000万元，从第1年到第5年每年年末都有净现金流量300万元。则项目的静态投资回收期为（ ）年。
下图是某地的街区网络图（单位:）里），疫情防控期间，一辆消毒车从疾控中心出发，需要消杀所有的街道并返回疾控中心。该消毒车完成消杀工作至少需要运行（ ）公里 。
某公司有东部、中部、西部三个生产基地，生产的产品需要运送带甲、乙、丙、丁四个市场，从生产基地到各个市场的单位运价及产量和需求量如表所示，完成该运输任务所需的最小运费为（ ）。
某炼油厂每季度需供应合同单位汽油15吨，煤油12吨，重油12吨，该厂从甲乙两处运回原油提炼，已知两处炼油成分如表所示，从甲处采购原油价格为2000元/吨，乙处为2900元/吨，为了使成本最低，炼油厂应从甲处购15吨，乙处采购（ ）吨。
某炼油厂每季度需供应合同单位汽油15吨，煤油12吨，重油12吨，该厂从甲乙两处运回原油提炼，已知两处炼油成分如表所示，从甲处采购原油价格为2000元/吨，乙处为2900元/吨，为了使成本最低，炼油厂应从甲处购（ ）吨，乙处采购20吨。
