题目内容

命令COUNT与函数RECCOUNT（）在用法和功能上有哪些相同处和不同处？

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柴油发动机发生“飞车”时，应迅速关闭电源，切断电路。

A. 正确
B. 错误

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GSM-R在话务量较大但对速度要求较低的编组站内采用（）小区覆盖。

A. 圆形
B. 椭圆形
C. 扇形
D. 矩形

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各种风机、空气压缩机等压力脉冲和气体排放发出的噪声属于（）。

A. 空气动力噪声
B. 机械性噪声
C. 磁性噪声

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Your network consists of a single Active Directory domain. The domain contains a server named Server1 that runs Windows Server 2008 R2. All client computers run Windows 7. All computers are members of the Active Directory domain. You assign the Secure Server (Require Security) IPsec policy to Server1 by using a Group Policy object (GPO). Users report that they fail to connect to Server1. You need to ensure that users can connect to Server1. All connections to Server1 must be encrypted. What should you do？（）

A. Restart the IPsec Policy Agent service on Server1.
B. Assign the Client (Respond Only) IPsec policy to Server1.
C. Assign the Server (Request Security) IPsec policy to Server1.
D. Assign the Client (Respond Only) IPsec policy to all client computers.

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