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问题 单项选择题

（）是指受教育者所学到的知识与到实际工作岗位实际运用这些知识之间的时间间隔。

A.知识转化滞后期

B.毕业生发展潜力

C.培养周期

D.知识和技能标准分

答案

参考答案：A

解答题

已知集合P={x|2x2-3x+1≤0}，Q={x|（x-a）（x-a-1）≤0}．

（1）若a=1，求P∩Q；

（2）若x∈P是x∈Q的充分条件，求实数a的取值范围．
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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 processConcerns into constructs called objects.

A．image

B．picture

C．layout

D．blueprint
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