In developing a hospital database, it is determined that on the average, each patient will have 6 treatments during a hospital stay.The average length of a stay is three days.The hospital has 1000 beds.There are on the average 800 patients occupying beds

题目

In developing a hospital database, it is determined that on the average, each patient will have 6 treatments during a hospital stay.The average length of a stay is three days.The hospital has 1000 beds.There are on the average 800 patients occupying beds each day.The relationship between PATIENT and TREATMENT is 1: M.The relationship between PATIENT and BED is 1:1, conditional.If treatment record occurrences are archived as soon as a patient is discarded from the hospital, how many occurrences of the TREATMENT records will be stored in the TREATMENT database file on the average?

A．6,000

B．4,800

C．18,000

D．1,600

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    参考答案：D

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    解析：
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  • 第3题：

    He's spent years cultivating a knowledge of art.

    A:denying
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    C:sharing
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    We are sure that he will get over his illness.

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    He's spent years cultivating a knowledge of art.

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    答案：D
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  • 第6题：

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