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问题 单项选择题

下列描述小儿生长发育规律不正确的是

A．由上到下
B．由远到近
C．由粗到细
D．由低级到高级
E．由简单到复杂

答案

参考答案：B

解析： 小儿生长发育由近到远，从臂到手，从腿到脚。

单项选择题

不受外来人为因素的干扰，是保证精算人员精算建议客观准确的一个重要条件。英国精算师协会明确规定（ ）：①精算师陈述其精算建议时必须是独立的；②不能让任何外来因素干扰精算师的建议或限制建议的使用范围；③精算师应对自己作为一个有道德的精算师负责；④在签发法律证明文件或报告之前，精算师无须根据以前的工作经验来确定是否符合专业行为标准。

A．①②③④

B．①②③

C．①②④

D．①③④
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单项选择题

(1) is used to ensure the confidentiality,integrity and authenticity of the two end points in the private network． (2) ，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 (3) to secure data traffic can automatically authenticate devices by using (4) ，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 (5) 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．

4（）

A．characteristics

B．associated links

C．digital certificates

D．attributes
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