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问题 单项选择题

闭合性肾损伤最常见的治疗方法是（）。

A.肾切除

B.引流

C.手术

D.肾修补术

E.暂保守，密切观察

答案

参考答案：E

解析：闭合性肾损伤多数是暂保守治疗，密切观察病情变化。

单项选择题 共用题干题

Information systems design is defined as those tasks that focus on the specification of a detailed computer-based solution. Typically, there are four systems design tasks for in-house development. 1)The first task is to specify (1), which defines the technologies to be used by one, more, or all information systems in terms of their data, processes, interfaces, and network components. This task is accomplished by analyzing the data models and process models that are initially created during requirements analysis. 2)The next systems design task is to develop the (2). The purpose of this task is to prepare technical design specifications for a database that will be adaptable to future requirements and expansion. 3)Once the database prototype has been built, the systems designer can work closely with system users to develop input, output and dialogue specifications. The (3) must be specified to ensure that the outputs are not lost, misrouted, misused, or incomplete. 4)The fourth design task involves packaging all the specifications from the previous design tasks into a set of specifications that will guide the (4) activities during the following phases of the systems development methodology. Finally, we should (5) and update the project plan accordingly. The key deliverable should include a detailed plan for the construction phase that should follow.

空白（2）处应选择（）

A.database design specifications

B.database organization decisions

C.data structure specifications

D.data distribution decisions
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选择题
如图所示，矩形线圈有N匝，长为a，宽为b，每匝线圈电阻为R，从磁感应强度为B的匀强磁场中以速度v匀速拉出来，那么，产生的感应电动势和流经线圈中的感应电流的大小应为（　　）

A．E=Bav，

B．E=NBav，

C．E=Bav，

D．E=NBav，

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