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问题 单项选择题 B1型题

在生物总碱溶于三氯甲烷中，用不同pH（由高到低）缓冲液依次萃取，首先萃取出的生物碱是（）

A.强碱性生物碱

B.弱碱性生物碱

C.酸碱两性生物碱

D.中等碱性生物碱

E.水溶性生物碱

答案

参考答案：A

单项选择题 B型题

病变部位一般不化脓的是（）

A.丹毒

B.新生儿皮下坏疽

C.疖

D.痈

E.脓性指头炎
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单项选择题

WLANs are increasingly popular because they enable cost-effective connections amongpeople, 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 ___24___ to improve their efficiency and reduce ___25___. 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 ___26___ 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 ___27___ 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 OpenView. 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 ___28___ and administrative chores.

26（）

A.finance 

B.patient 

C.affair 

D.doctor
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