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问题 单项选择题

尾矿库安全度主要根据尾矿库防洪能力和尾矿坝坝体稳定性确定，分为危库、险库、病库和正常库四级。下列属于病库工况的是( )。

A．经验算，坝体抗滑稳定最小安全系数小于规定值0.95
B．排洪系统部分堵塞或坍塌，排水能力有所降低，达不到设计要求
C．浸润线位置局部较高，有渗透水出逸，坝面局部出现沼泽化
D．坝体出现贯穿性横向裂缝，且出现较大范围管涌、流土变形

答案

参考答案：C

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（5）处应选择（）

A.adjust the project schedule

B.reevaluate project feasibility

C.evaluate vendor proposals

D.select the best vendor proposal
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单项选择题

凭证式国债认购可使用（）介质进行。

A.007/008/009

B.704

C.709

D.713
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