选址和平面布置对保证生产过程安全卫生占有很重要的地位。化学危险品库、氢氧站、氮氧站、油料库应远离火源，布置在厂区边缘地区及（） 最大频率风向的下风侧。 最大频率风向的上风侧。 最小频率风向的下风侧。 最小频率风向的上风侧。
You deploy a Windows Server 2008 VPN server behind a firewall. Remote users connect to the VPN by using portable computers that run Windows Vista with the latest service pack. The firewall is configured to allow only secured Web communications. You need to enable remote users to connect as securely as possible. You must achieve this goal without opening any additional ports on the firewall.What should you do？（） Create an IPsec tunnel.。 Create an SSTP VPN connection.。 Create a PPTP VPN connection.。 Create an L2TP VPN connection.。
简述文学思潮的主要特征。
x.25的层次结构不包括（） 物理层。 帧级。 分组级。 报文级。
You work as an application developer at Certkiller .com. You have been given the responsibility of creating a class named CalcSalary that will determine the salaries of Certkiller .com’s staff.The CalcSalary class includes methods to increment and decrement staff salaries.You would like to invoke the IncrementSalary and DecrementSalary methods dynamically at runtime from the sales manager application when needed. After viewing the information displayed in the exhibit， you decide to use the Salary delegate to invoke these methods. using System； public delegate boolSalary （Employee Emp， double Amount）； public class CalcSalary { // for promotions public static bool IncrementSalary （Employee Emp， double Amount） { // implementation details } // for demotions public static bool DecrementSalary （Employee Emp， double Amount） { // implementation details } What code should you use？（） A。 B。 C。 D。
用于房地产出租、出售、信托、互换等经营活动的投资叫做（）
