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问题 单项选择题

《矿山安全法》于（）年11月7日第七届全国人民代表大会常务委员会第二十八次会议通过，1993年5月1日起施行。

A.1991 

B.1992 

C.1993

答案

参考答案：B

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 (1) to improve their efficiency 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 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 management by integrating with customers’ existing systems, such as Open View 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.

3（）

A．finance

B．patient

C．affair

D．doctor
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选择题

在人完成吸气过程时，膈顶部和胸廓的变化情况分别是（ ）

A．上升、上下径缩小

B．下降、上下径增大

C．上升、前后径增大

D．下降、前后径不变
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