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问题 单项选择题

按照深圳证券交易所的规定，每个交易日有( )个时间段为集合竞价时间。

A．1

B．2

C．3

D．4

答案

参考答案：B

解析： 深圳证券交易所规定，每个交易日的9:15～9:25为开盘集合竞价时间；14:57～ 15:00为收盘集合竞价时间。

问答题

池塘平静的水面上浮着一片树叶，将一块小石头扔进树叶附近的水面，会看到什么现象？能说明什么问题？
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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.

A．finance

B．patient

C．affair

D．doctor
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