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问题 单项选择题 A4型题

30岁妇女，停经45天， * * 不规则少量淋漓出血10余天。诊断性刮宫，病理报告为"蜕膜组织，未见绒毛"。

最可能的诊断是（）

A.先兆流产

B.不全流产

C.难免流产

D.异位妊娠

E.功能性子宫出血

答案

参考答案：D

单项选择题

(66) is used to ensure the confidentiality, integrity and authenticity of the two end points in the private network. (67) , 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 also handles the exchange of session keys used for that one transaction.
Networks that use (68) to secure data traffic can automatically authenticate devices by using (69) , which verify the identities of the two users who are sending information back and forth. IPsec can be ideal way to secure data in large networks that require secure connections among many devices.
Users deploying IPsec can (70) their network infrastructure without affecting the applications on individual computer. The protocol suite is available as a software-only upgrade to the network infrastructure. This alows security to be implemented without costly changes to each computer. Most important, IPsec allows interoperability among different network devices, PCs and other computing systems.

A．IPSec

B．SSL

C．L2TP

D．The Internet Key Exchange
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单项选择题

战略数据规划方法提倡采用规划和设计结合的策略建立企业信息系统，其中规划阶段从企业模型到实体分析，列出了多种途径，下列哪个不属于这些途径

A．BSP研究

B．主题数据库研究

C．关键成功因素

D．结构化程序设计

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