● One tool that is useful during both analysis and design is the (72) ,which is
● One tool that is useful during both analysis and design is the （72） ,which is a pictorial representation of the items of information(entities) within the system and the relationships between these pieces of information.
（72）
A．data dictionary
B．dataflow diagram
C．use case diagram
D．entity-relationship diagram
正确答案：D试题（72）分析 在系统分析和设计中同样适用的工具是答案D实体关系图，它通过图形形式，表现系统内的实体信息以及这些信息之间的关系。参考答案 （72）D
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