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【单选题】
C.事件探查器 D.服务管理器 14264. FMS 的管理控制系统的设备软件模块中不包括 ___
A. 网络模块
B. 系统管理程序模块
C. 接口模块
D. 调速模块
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SQL Server 是支持客户-服务器结构(C/S)的数据库管理系统,以下对于 C/S 结构描述不正确的是 ___
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B. 客户机负责系统与用户的交互和数据显示
C. C/S 结构是把整个数据处理的任务划分为在客户机上完成的任务和在服务器上完成的任务
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B. 如果访问本地服务器,无论以哪种方式启动查询分析器,都不会显示登录对话框
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SQL 语言通常称为 ___
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A. 互联网
B. 电信
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根据不同的业务需求来建立数据模型,抽取最有意义的向量,决定选取哪种方法的数据 分析角色人员是 ___
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C.数据管理人员 D.软件开发工程师 14271. 反映数据的精细化程度,越细化的数据,价值越高 ___
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大数据的最显著特征是 ___
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度考虑一组测试用列-2.001,-2,20,2.001,设计这组测试用列的方法是 ___
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(uW)标签 ___
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下面___不能减少工艺系统受力变形。
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与常规切削加工相比,高速切削加工的单位时间内材料切除率___。
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B. 低于常规切削加工
C. 略高于常规切削加工
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【单选题】
关于高速切削,___的描述是错误的。
A. 由于主轴转速高,所以易造成机床振动
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C. 由于 95%以上的切削热被切屑迅速带走,所以适合加工易产生热变形及热损伤要高较高的
【单选题】
D.与传统切削相比,单位时间内材料去除率增加 3~6 倍,生产效率高11006.用于高速切削(>4000r/min)的回转刀具,___的描述是不准确的。
A. 只能采用 1/10 短锥刀柄形式
B. 刀片不允许采用摩擦力夹紧方式
C. 必须经过动平衡测试
D. 刀柄和主轴的锥面及端面同时接触
【单选题】
C.条件①和② D.条件①和③ 11009.下面有关高速加工工艺特点的说法错误的是___。
A. 高速加工应尽量采用低压、外部冷却方式
B. 高速加工具有高的切削速度
C. 高速加工采用小层深的分层切削
D. 相较于普通数控加工,高速加工的刀轨更需要流畅
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