了解苹果的覆盖度信息，为您的产品。
可公度信息系是一种源于天文学的预测方法，其实质是寻求事物发生的经验关系。
Commensurability information system is a forecasting method originated from astronomy, of which the substance is finding the empirical relations of things occurrence.
为此，运用粗糙集理论对试卷进行分析，揭示隐藏其中的冗余信息和重要度信息。
For improving, applying rough set theory, analyses the test paper, and discovers both redundance and significant level information.
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