以下镶块分块合理的是（）。 A. B. C.

细胞粘附因子mRNA测定的最关键点是()

A．应戴手套

B．扩增检测方法

C．加样器要专用

D．在标本的收集、处理和核酸提取纯化时，要注意防止RNA的降解

E．测定标本的选择

某五层住宅，层高为3.0m，用经验法估算从室外地面算起该给水系统所需的压力为 ( )kPa。

A．480
B．250
C．240
D．200

读我国某区域示意图，回答1、2题。

                                                 

1．图中①、②两地之间的山脉是：[     ]

A．贺兰山  

B．阴山

C．大巴山  

D．秦岭

2．关于①、②两地差异的叙述，正确的是：[     ]

A．①地是草原，②地是森林  

B．①地是半干旱地区，②地是半湿润地区

C．①地属于黄河流域，②地属于长江流域

D．①地是中温带，②地是暖温带

以RNA为模板指导DNA的合成（）。

A.翻译

B.复制

C.反转录

D.转录

E.基因表达

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．exploitation

B．connection

C．department

D．deployment