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问题 单项选择题

现有一台设备，目前实际价值P：5000元，预计残值Ln＝500元，第一年的设备运行成本Q＝500元，每年设备的劣化增量是均等的，年劣化值为250元，则该设备的经济寿命为( )年。

A．3

B．4

C．5

D．6

答案

参考答案：D

单项选择题 A1型题

卫生法所调整的法律关系是（）。

A.卫生技术人员在医疗中发生的关系

B.所有医药卫生人员在技术服务中的关系

C.医疗机构的服务关系

D.在卫生活动过程中所发生的社会关系

E.国家行政机关管理活动中的关系
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单项选择题

WLANs are increasingly popular because they enable cost-effective connections among people, applications and data that were not possible, or not cost-effective, in the past. For example, WLAN-based applications can enable fine-grained management of supply and distribution (166) to improve their efficienty and reduce (167) . WLANs can also enable entirely new business processes. To cite but one example, hospitals are using WLAN-enabled point-of-care applications to reduce errors and improve overall (168) care. WLAN management solutions provide a variety of other benefits that can be substantial but difficult to measure. For example, they can protect corporate data by preventing (169) through rogue access points. They help control salary costs, by allowing IT staffs to manage larger networks without adding staff. And they can improve overall network mananement by integrating with customers’ existing systems, such as OpenView and UniCenter. Fortunately, it isn’t necessary to measure these benefits to justify investing in WLAN management solutions, which can quickly pay for themselves simply by minimizing time-consuming (170) and administrative chores.

（169）是（）

A.intrusion

B.aggression

C.inbreak

D.infall
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