从2008年7月1日至2009年1月1日该类住宅楼市场价格每月递增1．5%，其后至2009年11月1日则每月递减0．5%，而从2009年11月1日至2010年4月30日的市场价格基本不变，以后每月递增1%。估价人员拟从以下几个交易实例中选取三个作为可比实例，并估算该住宅楼2010年8月31日的正常单价。（如需计算平均值，请采用简单算术平均）。

如果选择3个作为可比实例，以上( )不适合作可比实例。

A:交易实例A B:交易实例B C:交易实例C D:交易实例D

从2008年7月1日至2009年1月1日该类住宅楼市场价格每月递增1.5%，其后至2009年11月1日则每月递减0.5%，而从2009年11月1日至2010年4月30日的市场价格基本不变，以后每月递增1%。估价人员拟从以下几个交易实例中选取三个作为可比实例，并估算该住宅楼2010年8月31日的正常单价。（如需计算平均值，请采用简单算术平均）。

如果选择3个作为可比实例，以上( )不适合作可比实例。

A:交易实例A B:交易实例B C:交易实例C D:交易实例D

可比实例

实例

下列( )属于认知的实例。

A:学生在考试之后能准确地预测自己的分数 B:学生在学习中能举一反三 C:学生在阅读时遇到难点停下来思考，或回到前面重新阅读 D:利用复述策略记忆

下面关于模式和实例的说法中，不正确的是

A:模式的一个具体值称为模式的一个实例 B:一个模式对应着一个唯一的实例 C:模式是相对稳定的，实例是相对变动的 D:模式反映的是数据的结构及其联系

可比实例成交价格乘以交易情况修正系数等于( )

A:可比实例正常价格 B:估价对象市场价格 C:可比实例比较价格 D:估价对象比较价格

With the explosive popularity of mobile devices, we have witnessed a steady increase in demand for mobile date service. In addition mobile users also expect to connect to the Internet for communicate and access to services through the best suitable connection, anywhere and at anytime. Although the seamless roaming capability is well supported in conventional. Cellular communication networks, roaming and interworking technologies are still immature in heterogenous wireless networks. Seamless roaming over heterogenous wireless networks will be an ongoing and improved process, due to the requirements from both end users and network administrators. From the wireless access networks belonging to different administrative domains, mobile users cannot always identify at every instance which network is the best one to access for their service. It is highly demanded to establish a network architecture which can facilitate mobile terminals to access the appropriate network in a cost-effective way. If a mobile user wants to move from one network to another with continuous service, the terminals have to cope with network change to maintain service seamlessly. Quality of service is a major issue that the end users should be provided with the satisfying service, while the network workload and cost should not too much increased. In addition, since end users are provided with numerous service ranging from Voice-over-IP to Video-on-Demand services, it is expected that users can experience the same quality for all the different service. Therefore, the network architecture need to be designed in such a way that the quality mechanism is incorporated so that users are served according to their individual QoS requirements. Based on the paragraph above 。

Because of (　), mobile users cannot always identify at every instance which network is the best one to access for their services.

A:the different network administrative domains B:the same network administrative domains and mobile users C:mobile users D:the same network administrative domains