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问题 填空题

地球上的海洋面积约为3.6亿平方千米，那么3.6亿平方千米是______．（近似数还是精确数）

答案

地球上的海洋面积约为3.6亿平方千米，不是十分准确，所以3.6亿平方千米是近似数．

单项选择题

(71) analysis emphasizes the drawing of pictorial system models to document and validate both existing and/or proposed systems. Ultimately, the system models become the (72) for designing and constructing an improved system. (73) is such a technique. The emphasis in this technique is process-centered. Systems analysts draw a series of process models called (74) 、 (75) is another such technique that integrates data and process concerns into constructs called objects.

（72）应选（）。

A．image

B．picture

C．layout

D．blueprint
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单项选择题

应用服务器模式（）

A.业务逻辑处在中层

B.是三级体系结构

C.在客户端进行业务处理

D.比C/S模式效率高
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