正确答案:

题目：形象质量包括企业的整体形象和企业所在地区形象两个层次。（）

解析：√

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举一反三的答案和解析：

[多选题]我国的数据通信网大致包括（）。

数字数据网

分组交换网

帧中继网

ATM网

解析：ABCD

[单选题]全球星系统中，每个业务区总有（ ）颗卫星加以覆盖。[1分]

2-4

[单选题]通常空调风量的调整可以通过（ ）的变化来实现。

电动机转速

[单选题]数值数据在计算机内用二进制编码表示，常用的编码有()。

补码

[单选题]智能网电话业务中。800号业务的特点是（）。

通信费用为主、被叫用户分摊 主叫用户免费，由被叫用户集中付费 用户可通过电话卡及密码记账实现长途直拨电话 用户可通过拨通特定字头的电话号码获取某类信息

[多选题]阅读下面的短文，回答问题 [When an IP packet arrives at a router, generally the router looks at the destination address of the packet, and forwards the packet to one of its network interfaces. The forwarding decision is usually done by looking up the destination address from another data structure called a forwarding table. The forwarding table is created by the router using the routing table and possible routing policies existing in the router. The router then creates a table where it lists which networks are accessible through which of the router’s network interfaces. An IP router looks at every IP packet individually and does the forwarding decision on a packet-by-packet basis. If something changes in the router’s routing table, a packet can take a different route from a preceding packet even if it has the same destination.] From the paragraph above，we can see that the router （ ） a forwarding table according to the routing table and possible routing policies existing in the router. When an IP packet arrives at a router, the （ ） part of packet is normally checked by the router. An IP router checks every IP Packet individually and makes the forwarding decision based on （ ）.

is generated

generates A．forwarding table

routing policies

destination address A．the destination address and network interfaces

the destination address and forward table

routing policies and routing table

解析：D,D,C