甲、乙两地相距750千米，客车和货车同时从两地相对开出，3小时后两车还相距450

软件设计模块化的目的是 【4】 。

在实验法研究的示例“响尾蛇是如何追寻它放走的猎物的”实验中，人为控制的条件是（　　）

A．响尾蛇是否袭击了老鼠

B．老鼠是否是被响尾蛇袭击而中毒

C．响尾蛇是否是饥饿状态

D．设定的路径是否相同

大额实时支付系统业务的处理按照（）的要求进行。

A.换人复核

B.分级授权

C.逐笔发送

D.组包发送

黄海灯泡厂在自己生产的灯泡上注明为胜利灯泡厂生产，导致他人误认而购买。黄海灯泡厂的灯泡质量不好，致使胜利灯泡厂商誉受损，造成胜利灯泡厂很大的损失，胜利灯泡厂向法院起诉要求黄海灯泡厂赔偿损失，法院在计算损失时发现胜利灯泡厂的损失很难计算，问此时赔偿额应当包括哪些部分

A．黄海灯泡厂因侵权获得的利润

B．胜利灯泡厂调查黄海灯泡厂侵权行为所支付的合理费用

C．胜利灯泡厂比上一年度同一时期减少的利润

D．黄海灯泡厂所获得的利润

(71) is used to ensure the confidentiality, integrity and authenticity of the two end points in the private network. (72) , an application-layer protocol, authenticates each peer in an IPSec transaction.IKE negotiates security policy, determining which algorithm may be used to set up the tunnel. It alsohandles the exchange of session keys used for that one transaction.
Networks that use (73) to secure data traffic can automatically authenticate devices by using (74) , which verify the identities of the two users who are sending information back and forth. IPSeccan be ideal way to secure data in large networks that require secure connections among many devices.
Users deploying IPSec can (75) their network infrastructure without affecting the applications on individual computer. The protocol suite is available as a software-only upgrade to the networkinfrastructure. This alows security to be implemented without costly changes to each computer. Mostimportant, IPSec allows interoperability among different network devices, PCs and other computingsystems.

A．authenticity
B．IPSec
C．confidentialily
D．integrity