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问题 单项选择题

水环境容量计算时，污染因子应包括（）、开发区可能产生的特征污染物和受纳水体敏感的污染物。

A.国家和地方规定的重点污染物

B.国家规定的重点污染物

C.地方规定的重点污染物

D.当地居民规定的重点污染物

答案

参考答案：A

选择题

在一个电源两端接有两个灯泡，用电流表测得通过这两个灯泡的电流相等，则这两个灯泡的连接方式（　　）

A．一定是串联

B．一定是并联

C．串联、并联都可以

D．条件不足，无法判断
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单项选择题 共用题干题

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 (1) to improve their efficienty and reduce (2) .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 (3) 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 (4) 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(5) and administrative chores.

空白处（4）应选择（）

A.intrusion

B.aggression

C.inbreak

D.infall
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