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问题 单项选择题

适用于软X线摄影的部位是

A．头颅

B．乳腺

C．胸部

D．四肢

E．颈椎

答案

参考答案：B

解析：软X线摄影管电压范围是25～ 40kV，只有乳腺适合，其余4个部位均穿透困难。

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.

28（）

A.exploitation 

B.connection 

C.department 

D.deployment
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单项选择题

哪种影像学检查对发现肝脏转移癌最为敏感（）

A.Doppler-US

B.B-US

C.CT

D.MRI

E.肝动脉造影
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