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问题 单项选择题

在审计实务中，究竟选择统计抽样还是非统计抽样，主要取决于审计人员对（）。

A.抽样总体的考虑

B.样本规模的考虑

C.成本效益方面的考虑

D.审计程序的考虑

答案

参考答案：C

单项选择题

Networks can be interconnected by different devices．In the physical layer，networks can be connected by (64) or Hubs, which just move the bits from one network to an identical net-work. One layer up we find bridgas and swiehes, which operate at data link layer. They can accept (65) , examine the MAC address, and forward the frames to a different network while doing minor protocol translation in the process. In the network layer, we have routers that can connect two netwoks. If two networks have (66) network layer, the router may be able to translate between the packet formats. In the transport layer we find transport gateway, which can interface between the two transport connections. Finally, in the application layer, application gateways translate message

(67) . As an example, gateways between Internet e-mail and X.400 e-mail must (68) the e-mail message and change various header fields.

66（）

A．special

B．dependent

C．similar

D．dissimilar
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单项选择题

当施行过量减压和紧急制动时，JZ-7型制动机的保持阀将使（）的空气压力保持280~340kPa。

A.作用风缸

B.工作风缸

C.降压风缸
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