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在网上银行的四大类服务项目中，“交易历史查询”属于（）类服务。

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伺服系统一般由四部分组成一个闭合环路，其中环路滤波器的作用是滤除（）

A. 误差信号的高频分量
B. 误差信号的低频分量
C. 误差信号的高频分量和高频干扰分量
D. 误差信号中的低频分量和低频干扰分量

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电信申请人应当具备与民用航空通信导航监视服务保障工作相关的知识之一是（）

A. 行业英语知识
B. 专业技术知识
C. 发动机维修相关知识
D. 设备的详细工作原理、信号流程图

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You work as the IT professional in an international company which is named Wiikigo. You are experiencedin implementing and administering a network operating system. You are specialized in deploying servers，configuring Windows Server 2008 Terminal services and network application services， and configuring aweb services infrastructure. You are in charge of a server that runs Windows Server 2008. The Web Server（IIS） server role and the FTP Publishing Service role service are installed on the server. You have a newFTP site added to the server. You have to make sure that the new FTP site is available. In order to makesure of this，what action should you perform？（）

A. In order to make sure of this， the iisreset command should be run on the server.
B. In order to make sure of this， a host header file should be configured in the default Web site properties.
C. In order to make sure of this， an alternate IP address should be configured in the default Web siteproperties.
D. In order to make sure of this， an alternate TCP port should be configured in the FTP site properties.
E. In order to make sure of this， an alternate IP address should be configured in the FTP site properties.

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杨某15周岁，为中国科技大学学生，智力超常，生活自理能力很强，根据我国《民法通则》规定，杨某（）。

A. 是完全民事行为能力人
B. 是无民事行为能力人
C. 可视为完全民事行为能力的人
D. 是限制民事行为能力的人

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