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You are developing an application that runs by using the credentials of the end user. Only users who are members of the Administrator group get permission to run the application. You write the following security code to protect sensitive data within the application.bool isAdmin=false； 
WindowsBuiltInRole role=WindowsBuiltInRole.Administrator； ...... 
if（!isAdmin） 
        throw new Exception（"User not permitted"）；  
You need to add a code segment to this security code to ensure that the application throws an exception if a user is not a member of the Administrator group. Which code segment should you use？（）

Which of the following types of attacks does DHCP snooping prevent？（Choose all that apply.）（） Attacker sends multiple DHCP requests flooding DHCP server。 Attacker connects rogue server initiating DHCP requests。 Attacker connects rogue server replying to DHCP requests。 Attacker sends DHCP jam signal causing DHCP server to crash。 Attacker sends gratuitous ARP replies， thereby jamming the DHCP server。 Attacker sends unsolicited DHCP replies， thereby jamming the DHCP server。 资本主义的道德鲜明特点是（），（）与（）。 You work in a company which is named Wiikigo Corp. The company uses SQL Server 2008. You are the administrator of the company database. Now you are in charge of a SQL Server 2008 instance. There is a database named Dworks in the instance. The Dworks database has a table named Orderthings. According to the company requirement, you have to export all data from the Orderthings table to a file. During the export, you must make sure that the data export process is saved for reuse and a Microsoft Office Open XML document format is used. What should you do?（）   You should run the bulk copy program utility along with an output file and no format file。 You should run the SQLCmd utility and save the output to a file。 You should run the SQL Import and Export Data Wizard and save the output to a file.。 You should run the bulk copy program utility along with a format file and an output file.。 《幽明录》 毒物是（） 对大鼠经口LD50＞500mg/kg体重的物质。 凡引起机体功能或器质性损害的物质。 具有致癌作用的物质。 在一定条件下，较小剂量即能对机体发生损害作用的物质。

You are developing an application that runs by using the credentials of the end user. Only users who are members of the Administrator group get permission to run the application. You write the following security code to protect sensitive data within the application.bool isAdmin=false； 
WindowsBuiltInRole role=WindowsBuiltInRole.Administrator； ...... 
if（!isAdmin） 
        throw new Exception（"User not permitted"）；  
You need to add a code segment to this security code to ensure that the application throws an exception if a user is not a member of the Administrator group. Which code segment should you use？（）